[Bug 1684240] [NEW] Mouse pointer behaves strangely

[Jacob Greenstein]

Public bug reported:

(This can also be an nvidia related problem)

Mouse pointer behaves as if it has an invisible square attached to it.
This square covers some area next to the pointer, but it is not always
clear exactly where (a link to a screenshot is shown below, please note
the white square with some text from the previous webpage displayed in
that window).

This makes selecting text difficult, as one never knows where exactly
the selection ends. Also, scrolling in some windows becomes problematic,
as the pointer shadows a part of the scrollbar. When a text is being
typed, one needs to make sure that the pointer is parked sufficiently
far from the text (so, to make a long story short, this is very
annoying).

This behavior does not depend on the choice of the cursor theme.

(A link to the screenshot: https://goo.gl/photos/92KKGyFs3AkdxYb79)

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: plasma-workspace 4:5.9.4-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Apr 19 10:41:58 2017
InstallationDate: Installed on 2015-06-05 (684 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: plasma-workspace
UpgradeStatus: Upgraded to zesty on 2017-04-13 (5 days ago)

** Affects: plasma-workspace (Ubuntu)
Importance: Undecided
Status: New


** Tags: amd64 apport-bug zesty
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Title:
Mouse pointer behaves strangely

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[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: plasma-workspace (Ubuntu)
Status: New => Confirmed
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Title:
Mouse pointer behaves strangely

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[Loïc Gomez]

I can confirm this issue, I have the same problem since zesty update.

I cannot use apport-collect to complete information as I'm also affected
by https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1627790

So here's too much information !
If you need more please just ask away.

-- Loïc

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 17.04
Release: 17.04
Codename: zesty
$ uname -a
Linux valefor 4.8.0-45-generic #48-Ubuntu SMP Fri Mar 24 11:46:39 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ dpkg -l 'plasma*' |grep -v '^u'
Souhait=inconnU/Installé/suppRimé/Purgé/H=à garder
| État=Non/Installé/fichier-Config/dépaqUeté/échec-conFig/H=semi-installé/W=attend-traitement-déclenchements
|/ Err?=(aucune)/besoin Réinstallation (État,Err: majuscule=mauvais)
||/ Nom Version Architecture Description
+++-===============================================-====================-============-============================================================
ii plasma-dataengines-addons 4:5.9.4-0ubuntu1 amd64 additional data engines for Plasma
ii plasma-desktop 4:5.9.4-0ubuntu1 amd64 Tools and widgets for the desktop
ii plasma-desktop-data 4:5.9.4-0ubuntu1 all Tools and widgets for the desktop data files
ii plasma-discover 5.9.4-0ubuntu1 amd64 Discover software management suite
ii plasma-discover-common 5.9.4-0ubuntu1 all Discover software manager suite (common data files)
rc plasma-discover-private 5.6.2-1ubuntu1.1 amd64 Private runtime libraries for the Discover suite
ii plasma-framework 5.31.0-0ubuntu1 amd64 Plasma Runtime components
ii plasma-integration 5.9.4-0ubuntu1 amd64 Qt Platform Theme integration plugins for KDE Plasma
ii plasma-look-and-feel-org-kde-breezedark-desktop 4:5.9.4-0ubuntu1 all Dark Breeze look-and-feel for Plasma
ii plasma-nm 4:5.9.4-0ubuntu1 amd64 Plasma5 networkmanager library.
ii plasma-pa 4:5.9.4-0ubuntu1 amd64 Plasma 5 Volume controller
ii plasma-runner-telepathy-contact 4:16.12.3-0ubuntu1 amd64 Telepathy Contact KRunner plugin
ii plasma-runners-addons 4:5.9.4-0ubuntu1 amd64 additional runners for Plasma 5 and Krunner
ii plasma-scriptengine-javascript 4:16.12.3-0ubuntu1 amd64 JavaScript script engine for Plasma
ii plasma-wallpapers-addons 4:5.9.4-0ubuntu1 amd64 additional wallpaper plugins for Plasma 5
ii plasma-widget-folderview 4:16.04.3-0ubuntu1 amd64 plasma widget showing the content of a folder
ii plasma-widgets-addons 4:5.9.4-0ubuntu1 amd64 additional widgets for Plasma 5
rc plasma-widgets-workspace 4:4.11.11-0ubuntu0.2 amd64 plasma widgets and containments for the KDE Plasma Workspace
ii plasma-workspace 4:5.9.4-0ubuntu1 amd64 Plasma Workspace for KF5
$ lsmod
Module Size Used by
xt_nat 16384 1
veth 16384 0
uas 24576 0
usb_storage 73728 1 uas
btrfs 1060864 0
xor 24576 1 btrfs
raid6_pq 102400 1 btrfs
ufs 73728 0
qnx4 16384 0
hfsplus 106496 0
hfs 57344 0
minix 40960 0
ntfs 102400 0
msdos 20480 0
jfs 184320 0
xfs 1044480 0
libcrc32c 16384 1 xfs
rfcomm 77824 2
ccm 20480 2
xfrm_user 32768 1
ipt_MASQUERADE 16384 6
nf_nat_masquerade_ipv4 16384 1 ipt_MASQUERADE
aufs 233472 339
xt_recent 20480 1
xt_comment 16384 16
ipt_REJECT 16384 4
nf_reject_ipv4 16384 1 ipt_REJECT
xt_physdev 16384 0
br_netfilter 24576 1 xt_physdev
xt_mark 16384 1
iptable_mangle 16384 1
xt_addrtype 16384 6
xt_tcpudp 16384 46
xt_CT 16384 22
iptable_raw 16384 1
xt_conntrack 16384 45
xt_NFLOG 16384 0
nfnetlink_log 20480 1 xt_NFLOG
xt_LOG 16384 3
nf_log_ipv4 16384 3
nf_log_common 16384 1 nf_log_ipv4
nf_nat_tftp 16384 0
nf_nat_snmp_basic 20480 0
nf_conntrack_snmp 16384 3 nf_nat_snmp_basic
nf_nat_sip 20480 0
nf_nat_pptp 16384 0
nf_nat_proto_gre 16384 1 nf_nat_pptp
nf_nat_irc 16384 0
nf_nat_h323 20480 0
nf_nat_ftp 16384 0
nf_nat_amanda 16384 0
ts_kmp 16384 5
nf_conntrack_amanda 16384 3 nf_nat_amanda
nf_conntrack_sane 16384 2
nf_conntrack_tftp 16384 3 nf_nat_tftp
nf_conntrack_sip 28672 3 nf_nat_sip
nf_conntrack_proto_udplite 16384 0
nf_conntrack_proto_sctp 24576 0
nf_conntrack_pptp 16384 3 nf_nat_pptp
nf_conntrack_proto_gre 16384 1 nf_conntrack_pptp
nf_conntrack_netlink 40960 0
nfnetlink 16384 2 nfnetlink_log,nf_conntrack_netlink
nf_conntrack_netbios_ns 16384 2
nf_conntrack_broadcast 16384 2 nf_conntrack_snmp,nf_conntrack_netbios_ns
nf_conntrack_irc 16384 3 nf_nat_irc
nf_conntrack_h323 77824 5 nf_nat_h323
nf_conntrack_ftp 20480 3 nf_nat_ftp
xt_multiport 16384 4
pci_stub 16384 1
vboxpci 24576 0
vboxnetadp 28672 0
ebtable_filter 16384 0
ebtables 36864 1 ebtable_filter
vboxnetflt 28672 0
ip6table_filter 16384 0
ip6_tables 28672 1 ip6table_filter
vboxdrv 454656 4 vboxnetadp,vboxnetflt,vboxpci
deflate 16384 0
twofish_generic 20480 0
twofish_avx_x86_64 49152 0
twofish_x86_64_3way 28672 1 twofish_avx_x86_64
twofish_x86_64 16384 2 twofish_x86_64_3way,twofish_avx_x86_64
twofish_common 24576 4 twofish_generic,twofish_x86_64_3way,twofish_avx_x86_64,twofish_x86_64
camellia_generic 32768 0
camellia_aesni_avx2 28672 0
camellia_aesni_avx_x86_64 28672 1 camellia_aesni_avx2
camellia_x86_64 53248 2 camellia_aesni_avx_x86_64,camellia_aesni_avx2
serpent_avx2 49152 0
serpent_avx_x86_64 49152 1 serpent_avx2
serpent_sse2_x86_64 53248 0
serpent_generic 32768 3 serpent_sse2_x86_64,serpent_avx_x86_64,serpent_avx2
blowfish_generic 16384 0
blowfish_x86_64 24576 0
blowfish_common 20480 2 blowfish_generic,blowfish_x86_64
cast5_avx_x86_64 53248 0
cast5_generic 24576 1 cast5_avx_x86_64
cast_common 16384 2 cast5_avx_x86_64,cast5_generic
des_generic 24576 0
cmac 16384 0
xcbc 16384 0
rmd160 20480 0
af_key 36864 2
xfrm_algo 16384 2 xfrm_user,af_key
bbswitch 16384 0
bnep 20480 2
iptable_filter 16384 1
iptable_nat 16384 1
nf_conntrack_ipv4 16384 68
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
nf_nat_ipv4 16384 1 iptable_nat
nf_nat 24576 11 nf_nat_pptp,nf_nat_proto_gre,xt_nat,nf_nat_h323,nf_nat_sip,nf_nat_irc,nf_nat_ftp,nf_nat_amanda,nf_nat_masquerade_ipv4,nf_nat_ipv4,nf_nat_tftp
nf_conntrack 114688 29 nf_nat_pptp,nf_conntrack_sip,nf_conntrack_snmp,nf_conntrack_proto_sctp,nf_conntrack_irc,nf_nat_h323,nf_conntrack_ftp,nf_nat_snmp_basic,nf_nat_sip,nf_conntrack_ipv4,nf_conntrack_tftp,nf_nat_irc,nf_conntrack_pptp,nf_conntrack_amanda,nf_conntrack_broadcast,nf_nat_ftp,nf_conntrack_sane,nf_nat_amanda,nf_conntrack_netlink,nf_conntrack_proto_udplite,nf_conntrack_netbios_ns,nf_conntrack_proto_gre,xt_CT,nf_nat_masquerade_ipv4,nf_conntrack_h323,xt_conntrack,nf_nat_ipv4,nf_nat_tftp,nf_nat
asus_nb_wmi 24576 0
asus_wmi 28672 1 asus_nb_wmi
sparse_keymap 16384 1 asus_wmi
mxm_wmi 16384 0
nls_iso8859_1 16384 1
arc4 16384 2
bridge 139264 1 br_netfilter
stp 16384 1 bridge
llc 16384 2 bridge,stp
btusb 45056 0
btrtl 16384 1 btusb
intel_rapl 20480 0
x86_pkg_temp_thermal 16384 0
btbcm 16384 1 btusb
intel_powerclamp 16384 0
btintel 16384 1 btusb
coretemp 16384 0
bluetooth 552960 31 btrtl,btintel,bnep,btbcm,rfcomm,btusb
kvm_intel 188416 0
kvm 598016 1 kvm_intel
uvcvideo 90112 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_v4l2 24576 1 uvcvideo
videobuf2_core 40960 2 uvcvideo,videobuf2_v4l2
videodev 180224 3 uvcvideo,videobuf2_core,videobuf2_v4l2
media 40960 2 uvcvideo,videodev
irqbypass 16384 1 kvm
intel_cstate 16384 0
intel_rapl_perf 16384 0
iwlmvm 360448 0
joydev 20480 0
mac80211 757760 1 iwlmvm
input_leds 16384 0
serio_raw 16384 0
iwlwifi 229376 1 iwlmvm
snd_hda_codec_hdmi 45056 1
cfg80211 581632 3 iwlmvm,iwlwifi,mac80211
lpc_ich 24576 0
snd_hda_codec_conexant 24576 1
snd_hda_codec_generic 73728 1 snd_hda_codec_conexant
mei_me 40960 0
shpchp 36864 0
mei 102400 1 mei_me
snd_hda_intel 36864 6
snd_hda_codec 135168 4 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec_hdmi,snd_hda_codec_generic
snd_hda_core 86016 5 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic
snd_hwdep 16384 1 snd_hda_codec
snd_soc_rt5640 118784 0
snd_soc_rl6231 16384 1 snd_soc_rt5640
nvidia_uvm 647168 0
snd_soc_core 233472 1 snd_soc_rt5640
snd_compress 20480 1 snd_soc_core
ac97_bus 16384 1 snd_soc_core
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_pcm 110592 8 snd_hda_intel,snd_hda_codec,snd_pcm_dmaengine,snd_hda_core,snd_soc_rt5640,snd_hda_codec_hdmi,snd_soc_core
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
wmi 16384 2 asus_wmi,mxm_wmi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_seq,snd_pcm
dw_dmac 16384 0
dw_dmac_core 24576 1 dw_dmac
snd 86016 24 snd_compress,snd_hda_intel,snd_hwdep,snd_hda_codec_conexant,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_soc_core,snd_pcm
soundcore 16384 1 snd
snd_soc_sst_acpi 16384 0
elan_i2c 36864 0
snd_soc_sst_match 16384 1 snd_soc_sst_acpi
int3406_thermal 16384 0
int3402_thermal 16384 0
i2c_designware_platform 16384 0
acpi_als 16384 0
i2c_designware_core 20480 1 i2c_designware_platform
spi_pxa2xx_platform 24576 0
8250_dw 16384 0
mac_hid 16384 0
processor_thermal_device 16384 0
kfifo_buf 16384 1 acpi_als
int340x_thermal_zone 16384 2 int3402_thermal,processor_thermal_device
int3400_thermal 16384 0
intel_soc_dts_iosf 16384 1 processor_thermal_device
industrialio 65536 2 acpi_als,kfifo_buf
acpi_thermal_rel 16384 1 int3400_thermal
asus_wireless 16384 0
intel_smartconnect 16384 0
dummy 16384 0
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,parport_pc,ppdev
ip_tables 28672 4 iptable_mangle,iptable_filter,iptable_raw,iptable_nat
x_tables 36864 21 xt_comment,xt_LOG,xt_multiport,ipt_REJECT,xt_nat,iptable_mangle,ip_tables,ebtables,iptable_filter,xt_mark,xt_tcpudp,iptable_raw,ipt_MASQUERADE,xt_recent,ip6table_filter,xt_addrtype,xt_CT,xt_physdev,xt_conntrack,ip6_tables,xt_NFLOG
autofs4 40960 2
algif_skcipher 20480 0
af_alg 16384 1 algif_skcipher
hid_generic 16384 0
dm_crypt 28672 1
usbhid 53248 0
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
i915 1314816 3
aesni_intel 167936 11165
nvidia_drm 49152 2
nvidia_modeset 790528 7 nvidia_drm
psmouse 139264 0
nvidia 12144640 152 nvidia_modeset,nvidia_uvm
i2c_algo_bit 16384 1 i915
aes_x86_64 20480 1 aesni_intel
lrw 16384 9 serpent_sse2_x86_64,camellia_aesni_avx_x86_64,serpent_avx_x86_64,camellia_x86_64,camellia_aesni_avx2,twofish_x86_64_3way,twofish_avx_x86_64,serpent_avx2,aesni_intel
drm_kms_helper 167936 2 i915,nvidia_drm
glue_helper 16384 9 serpent_sse2_x86_64,camellia_aesni_avx_x86_64,serpent_avx_x86_64,camellia_x86_64,camellia_aesni_avx2,twofish_x86_64_3way,twofish_avx_x86_64,serpent_avx2,aesni_intel
ablk_helper 16384 8 serpent_sse2_x86_64,camellia_aesni_avx_x86_64,serpent_avx_x86_64,camellia_aesni_avx2,twofish_avx_x86_64,serpent_avx2,cast5_avx_x86_64,aesni_intel
cryptd 24576 3723 ablk_helper,ghash_clmulni_intel,aesni_intel
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
drm 368640 6 i915,nvidia_drm,drm_kms_helper
ahci 36864 3
libahci 32768 1 ahci
sdhci_acpi 16384 0
video 40960 3 asus_wmi,int3406_thermal,i915
sdhci 45056 1 sdhci_acpi
i2c_hid 20480 0
hid 118784 6 i2c_hid,hid_generic,usbhid
fjes 28672 0
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Title:
Mouse pointer behaves strangely

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[Loïc Gomez]

Some additionnal information: tried to change cursor theme from Brise to any other and problem is still there.
Also changing vsync tearing parameter (or any other in fact) in composer settings did not help either.
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Mouse pointer behaves strangely

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[Jacob Greenstein]

Changed to nouveau; the problem disappeared.
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Mouse pointer behaves strangely

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[iLugo]

Finally found the bug report of this problem. It affects me, exactly the
same. I could provide more details BUT it doesn't seem to be relevant,
doesn't it? I explain:

A couple of notes, @jgrns:
What do you mean "the problem disappeared"? Does it mean: it "disappeared" from your system? Or: on everybody else's systems? It didn't "disappear" from mine. Mind to provide any useful context?

Posts like that are the ones that make so many people hate 'this' (you
know, Linux, FOSS, and all the things that they should not hate for
things like this). Not because you are inaccurate and confusing, but
because you seem to have the power to change the status of the bug
(without actually fixing it), whatever "nouveau" means in your launchpad
jargon.

The bugs reports are not to satisfy those who have the power of changing
status of bugs. They are for the users, because without users software
is useless. Far too frequently I see these useless posts that seem to
imply that magic does exist.

Problems don't "disappear" by magic in Engineering or in Science or in
Life. And if you think they do, at least you should propose some theory
that doesn't make you look that you just want to dismiss the problem or
make us believe that "if you wait long enough, all your problems in life
will disappear" --which is true, but some us don't want to wait until we
die to see all troubles vanishing from our lives. I would be fired if I
would ever suggest that to my customers, or worse, tell them that
because all of a sudden I ceased to see the problem, they are wrong and
it doesn't exist.

Sorry if it looks that I am irritated, but those six words did the job.
I am sure others with this problem would also feel. Please if you can't
help with this bug, or believe it's something magical that comes and go,
or if open tickets are annoying, then please at least don't dismiss it
with "it disappeared" without at least a slight context. It doesn't
really add credibility to a --presumably-- software developer who tells
users with a complaint that the problem was perhaps abducted by aliens
and now "is gone". It's not. It's a bad bug, it disrupts tremendously
the work in the KDE environment, to the point of almost preventing us to
work with most of the programs that use the mouse at all. It is a show
stopper.

You can change the status of the bug to whatever you please, it's not
"my" bug report system. But then it's a bit useless for the rest of the
people.

Anyhow, thanks for the bug report, because it is very well described. I
might copy/paste part of the description and seek for help somewhere
else.
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Mouse pointer behaves strangely

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[Jacob Greenstein]

You should realize that this is not some sort of a help desk but a
community where everyone is trying to help everyone by providing
information about their issues. I "own" this bug because I reported it,
but I am not a developer of the package involved.

In my first post I mentioned that this issue might be related with
Nvidia proprietary driver; it often happens when KDE is upgraded that
some issues arise because Nvidia maintainers do not keep up with the
advancement of KDE/plasma. The open source driver (nouveau) has a lot of
issues itself and I was reluctant to try it again; I did try it though
after someone wrote that they got around this issue by switching to
nouveau, and it worked for me. So, if you have an Nvidia card and are
using the proprietary driver, you may try nouveau instead. If not, you
will do everyone a service if you run ubuntu-bug on your system and
submit the information it collects.
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Mouse pointer behaves strangely

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[iLugo]

...and I should have guessed all that information from your six words
post because...?

So in your opinion: because I could not guess all of that, I should have
opened my own bug report and fight it all by myself from zero, ignoring
the fact that someone already had opened a bug report because "everyone
is trying to help everyone by providing information about their issues".

Touching words, "everyone trying to help everyone". But it seems that
this one was opened to get help for your own issue and not to "share"
anything with anyone. So "someone wrote" is another way of telling the
community (you say you are trying to help), that you are not sharing
neither contents of said advice nor source of it; you just happen to
"have found it". Nice.

So, should I have written my own report after wasting my time on this
one: how would you feel if I would have concluded it with a six words
post like: "I have fixed the problem now." with no more context. The
internet is full of this kind of rubbish. Precisely: not a Help Desk,
not a "sharing place", no nothing.

No, this is not Help Desk, and precisely because it's not, people should
use it consciously and realizing that it's not because one opens a
"ticket" that it makes them automatically a "community's hero" if you
are not going to steer the bug report in the sense of making it an
useful place of sharing information and not one where others will
stumble upon and get frustrated by the "I have fixed my problem,
goodbye" posts.

That community you talk about always expect that a bug report owner
would have the minimum courtesy of providing any information that might
be somehow relevant and potentially help. Not confusing/frustrating the
community, which is what posts like those do.

So like you said: "community where everyone is trying to help everyone
by providing information about their issues" is the opposite of what I
found here, as your own last two posts unfortunately prove it. Either
you share or you don't. You didn't. Just read your own words again,
please, and try to actually apply those good ideas, next time. That
would do everyone a service.
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Mouse pointer behaves strangely

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[Loïc Gomez]

Jacob message is pretty clear, I had no trouble understanding it, no
need to write so many lines just for this, please get over it.

Anyways, back to topic, the problem persists and is probably related to nvidia driver.
Is there a way we can contribute and analyze/test this problem ?

Thanks
Loïc
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Mouse pointer behaves strangely

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[Jacob Greenstein]

Merci beaucoup de votre soutien; comme vous pouvez le constater, je n'ai
pas répondu à deuxième message, pour terminer cette discussion inutile.

What I cannot figure out is whether it is a problem of the driver or
Nvidia OpenGL libraries. As far as I remember, installing the driver
forces the libraries to be installed. It would be interesting to try
installing just the driver (but not the libraries, if that is possible)
and to check whether the problem persists.

Perhaps we should file a bug with nvidia: it is possible that
developers/packagers of plasma did not notice this bug or weren't able
to reproduce it since they do not use Nvidia driver.
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Mouse pointer behaves strangely

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[Loïc Gomez]

You're welcome Jacob :)
See also https://bugs.launchpad.net/ubuntu/+source/libsdl2/+bug/1677540 even if it seems less intrusive as what I'm experiencing.

I'm using dual screen, do you too ?
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[Jacob Greenstein]

I use dual screen quite often but not always. This behavior is the same
for a single and a double screen. This is why I was reluctant to try
nouveau, which used to have a lot of issues with that configuration. So
far it works fine.

That other bug might be related; also, judging by the screenshot, they
are using Gnome.
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[Loïc Gomez]

Ok, I'm using an external screen but laptop screen is off when screen is connected.
I removed all nvidia drivers and tools and thus switched to nouveau, the problem is gone.

So this is most certainly related to nvidia drivers.

** Also affects: nvidia-graphics-drivers-375 (Ubuntu)
Importance: Undecided
Status: New
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[kelvie]

Like Loïc, I also use an external screen, with the laptop screen turned
off, and I see this problem.

I've also removed nvidia drivers temporarily, and primarily use the
Intel integrated card now.
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[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers-375 (Ubuntu)
Status: New => Confirmed
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[dskd]

I am affected by this bug as well.

My workaroud for this Problem: Go to KDE System Settings -> Display and
Monitor -> Compositor (left side) -> set "Rendering Backend" to XRender

But now my wobbly windows are gone ;(


I just upgraded to kubuntu 17.04 and this problem appeared (yeah, I knew an update would take some time, so I waited until I had some spare time).
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[Jacob Greenstein]

A new development: today I installed Kubuntu 17.04 from scratch on a new
laptop. The pointer behaves normally.
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[Ricardo Sanz]

I'm also affected by this bug.

I have a GeForce GTX 1060 Mobile video card, using nvidia-375
(375.66-0ubuntu0.17.04.1) package on Kubuntu 17.04 with backports
repository (Plasma 5.10.3).

It seems that the area around the mouse pointer is not redrawn properly.

Problem persists with compositor enabled and disabled.

The only workaround is what dskd (mark-p--sanders) said: use XRender as
rendering backend (but I think performance is affected).
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[Ricardo Sanz]

I forgot to mention I'm also using double monitor (laptop + external
screen with mini display port).

WORKAROUND: Use nvidia latest driver 381.22:
http://www.nvidia.com/Download/driverResults.aspx/118524/en-us

With this driver problem seems gone.
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[Lienhart Woitok]

I updated from Kubuntu 16.04 to 17.04 a few days ago to fix some other
issues with frequent crashes and on Kubuntu 17.04 am now also affected
by this bug.

I tried updating nvidia driers to 381 and 384 but I could detect no
difference between 375, 381 and 384 (from ppa:graphics-drivers/ppa). For
now I switched to XRender as recommended in #16. OpenGL 3.1 and 2.0 both
have the rectangle below the cursor.

I also use a dual screen setup but I could not detect a difference
between leaving the external screen unplugged or not.
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[David Matějček]

To me helped only unchecking the checkbox "Enable compositor on
startup".
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[Jason Tiller]

I am also experiencing the exact same issue on KDE Neon 5.10.4 and
nvidia-384.59, and switching to Xrender also fixes it for me.

Note that for me turning off compositing while using OpenGL 3.1 had a
salutory effect but did not completely resolve the problem. For
example, chromium still showed the issue but Konsole, system settings,
and nvidia-settings did not (I just had these up at the time).

I also noticed this issue crop up after updating to xorg 1.19.3. I
initially thought it was due to me running the Ubuntu 4.11.4-lowlatency
mainline kernel, but I also see the issue on 4.12.5.
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[dozer]

I can confirm this with the nvidia drivers. It happens when using opengl
(2.x and 3.x) compositing but not xrender compositing.
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[dozer]

Oh it's back to being broken when playing factorio.
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[W]

This bug is driving me nuts, but thankfully a workaround (that has been
working for me) is to log out of the initial KDE session and simply log
back in.

It's not ideal, but makes the bug more bearable.
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[W]

PS1: That workaround works (for me) even when the rendering backend is OpenGL.
PS2: I'm also using multiple monitors.
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[Jason Tiller]

I can confirm that logging out and then logging in also resolves the
issue for me.
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[elahens88]

I have the same problem, when restarting the sddm, or after login and
logout is resolved
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[hants]

I can confirm this with
Nvidia Driver 375.66
Ubuntu 16.04 + Kubuntu Backports
KDE Plasma Version 5.8.7
Kde Frameworks Version 5.36.0
and sddm

sudo dpkg-reconfigure lightdm

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[W]

I can now also confirm that this bug might be related to sddm.

sudo apt-get install slim

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[Sergio Sánchez López]

I have this error also. Anyone can fix it? I can't install Nvidia
Drivers Property of this. I have that use nouveau.

Thanks.
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[Bashar]

I have this bug too.
Logout and then Login temporary solves the problem.
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[Jacob D'Onofrio]

I also am affected by this issue. I am running KDE Neon with the hwe
kernel. My nvidia driver is 384.90.
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[Dionretz Vallarta]

i have this bug too can be fixed by (near fix):

1. change to noveau
2. compositor settings: xrender as rendering backend (no opengl2 & opengl3.1 apparently causes it) tearing prevention full screen repaints.
it should show waay lesser symptoms (occasional flicker of the cursor) than it should
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[Serhiy Zahoriya]

** Also affects: nvidia-graphics-drivers-384 (Ubuntu)
Importance: Undecided
Status: New

** Summary changed:

- Mouse pointer behaves strangely
+ Lagging square around mouse pointer
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[Serhiy Zahoriya]

I have this problem only if there are two user accounts running, only on
the second one and only after

# prime-select nvidia

16.04, -hwe kernel and xserver, SDDM and KDE from the backports PPA. I
don't want to disable OpenGL just for NVidia. Maybe later I'll write a
script for switching rendering backend automatically with `prime-select
query` and `kwriteconfig`
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[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers-384 (Ubuntu)
Status: New => Confirmed
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[Sergio Sánchez López]

Hello.

I have a MSI CX61 with Intel card and Nvidia GT740M. I also have this
problem with Nvidia Drivers Propietary. Any solution? Thanks.
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[Aleksandr]

You can remove sddm and use lightdm instead until this bug is not fixed
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[Sergio Sánchez López]

And, someone know when this bug will be fix? I have this bus from April
2017. Thanks!
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[Erlend Hamnaberg]

I had this problem with Cinnamon on ubuntu 17.04, and fixed it by
adding:

Option "DRI3" "1"

to the nvidia X11 device configuration.
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[Sergio Sánchez López]

Add Option "DRI3" "1" to XORG not run in KDE Plasma.

When will it bi fix? Thanks.
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[Chris]

I also have this on a fresh installation of Ubuntu 16.04 when using
nvidia-384.

Most workarounds do not work:
- Option "DRI3" "1" seems to have no effect.
- I'm already using lightdm (default) and not sddm, so the workaround of replacing sddm is N/A.
- I can't use the open-source driver because of other bugs. Booting is a pain and external monitors are not recognized.
- Even when one user is logged in, the problem manifests.

The only thing that works is to log out and back in, without
reconnecting any displays. But this is highly inconvenient and not a
viable solution.

Can we put more priority on this issue please? What is missing to get it
in a queue?
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[David Guerrero]

I'm also having this big on following configuration:
KDE neon User Edition 5.11
Nvidia GT 540m Driver 384.111
happening in both Opengl 2.0 and 3.1 and single/dual display

confirm workaround of logging out and logging in with sddm
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[David Cardozo]

Same even with the new nvidia drivers. Any solution near ?
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[Chris]

For people that do not need the external GPU, they could disable it and
only use the integrated Intel driver, after fixing a bug that causes
non-booting.

In case anyone needs it, here's what I did, after installing the nvidia-384 driver:
# Install bumblebee
apt install bumblebee
# Add my user to bumblebee group
gpasswd -a user bumblebee
# Switch to the intel card
prime-select intel
# Add to the grub kernel line: acpi_rev_override=1
sudo vim /etc/default/grub && sudo update-grub

# Followed steps 3, 4, 5 from these instructions: http://www.webupd8.org/2016/08/how-to-install-and-configure-bumblebee.html
# If you need the ext card and it doesn't work, try various steps from https://wiki.archlinux.org/index.php/bumblebee#Installation to enable it
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[Tore A]

Kubuntu 16.04 LTS. Very annoying bug but logout(after boot) and in again
works.
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[Andrea]

Confirmed that this should solve the issue.
System settings -> Display and Monitor -> Compositor -> Rendering backend: set XRender instead of OpenGL.

Disabling Compositor solve it aswell but if you want to keep the effects
just switch the backend.
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[Sergio Sánchez López]

Hello Andra.

But OpenGL will should offer more performance. I think that this bug
will should be fix for run with opengl.

Post by Andrea
Confirmed that this should solve the issue.
System settings -> Display and Monitor -> Compositor -> Rendering backend: set XRender instead of OpenGL.
Disabling Compositor solve it aswell but if you want to keep the effects
just switch the backend.

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[Scott Deagan]

I experienced this bug on both my laptops (both with Nvidia 9xx series
GPUs) with KDE Neon (developer stable), but not on my desktop PC. All
are running the latest proprietary Nvidia 390 drivers.

I observed today that the problem only occurs when the Nvidia GPU is in
use (sudo prime-select nvidia). The problem disappears if I switch to
the Intel GPU (sudo prime-select intel).

Interestingly, the problem does not occur on my laptops when running
Kubuntu 17.10, regardless of the GPU in use.
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[Scott Deagan]

As mentioned in other comments here, one workaround is to restart sddm
(or to log out and log back in again). Not very convenient.
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[dino99]

That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml

** Changed in: plasma-workspace (Ubuntu)
Status: Confirmed => Invalid

** Changed in: nvidia-graphics-drivers-384 (Ubuntu)
Status: Confirmed => Invalid

** Changed in: nvidia-graphics-drivers-375 (Ubuntu)
Status: Confirmed => Invalid
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[Sergio Sánchez López]

This happen in Ubuntu 16.04 LTS.
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[Serhiy Zahoriya]

** Changed in: nvidia-graphics-drivers-375 (Ubuntu)
Status: Invalid => Confirmed

** Changed in: nvidia-graphics-drivers-384 (Ubuntu)
Status: Invalid => Confirmed

** Changed in: plasma-workspace (Ubuntu)
Status: Invalid => Confirmed

** Tags removed: zesty
** Tags added: xenial
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[Serhiy Zahoriya]

I've found a more convenient workaround: the square does not appear at least on SDDM if the new session was started not from X but from a TTY.
The command I use in TTY is

$ qdbus --system org.freedesktop.DisplayManager
/org/freedesktop/DisplayManager/Seat0
org.freedesktop.DisplayManager.Seat.SwitchToGreeter
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[Joseph Gehring]

I will also confirm that I am using the most up to date version of the
graphics drivers and that a logout will fix the issue. hopefully this is
resolved in the upcoming update that i can not wait to try out. Keep up
the good work. Just in case this is still being looked at by someone my
hardware is as follows: Lenovo t530 with the Nvidia NVS 5400m graphics.
Keep up the good work ladies and gents! I know that i greatly appreciate
the hard work you all put in! It saves me from the disaster that is
windows (in my opinion). :)

Cheers
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Title:
Lagging square around mouse pointer

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[Tommy_CZ]

The bug still exists with latest nvidia drivers (!!!)
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Lagging square around mouse pointer

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[Bene]

Was fixed for me during the last updates on Lenovo W540 with Quadro K1100M.
I also updated to the latest displyLink drivers (4.2 08 Mar 2018).
NVIDIA driver version: 384.130
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Lagging square around mouse pointer

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[Kostanos]

Have the same issue. My system:
Ubuntu 16.04.5, latest updates. Unity desktop.
Nvidia 384.130 driver.
DisplayLink 4.2, tried also with 4.1, the same issue.

I also uploaded 12 seconds video:

cVU_cA

Can't confirm if this is Nvidia or DisplayLink or both drivers issue.

For sure, in my case, uninstalling DisplayLink driver everything works
fine.
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Lagging square around mouse pointer

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[Kostanos]

Update, logout and login again resolves the issue!!!
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Lagging square around mouse pointer

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[Markus Heß]

I have the same issue with KDE neon and Nvidia 396.51 on a Dell XPS 15
9570 (GTX 1050 Ti). Restarting sddm fixes the issue but is really
annoying.
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[Witold Burkiewicz]

Hello,
this is really annoying problem and apparently nobody cares except for the people that experience it.
But I have found a better workaround that works at least for me:
In /etc/init/sddm.conf after line:
exec sddm
add:
killall sddm
exec sddm

Just restarting sddm automatically right after it strated. No more
logout/login manually.
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[Witold Burkiewicz]

After several restarts the solution above sometimes didn't work, so I've modified it:
exec sddm
sleep 2
killall sddm
exec sddm
Possibly it will more persistent.
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[djem]

Okey guys i solved this i am on kubuntu i was having the exact same
problem, now to the solution

Go in System Settings > Display and Monitor > Compositor and change Rendering backend to xRender
if you still have the same problem get back into x.org/nouveau driver and thats it.
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[Witold Burkiewicz]

Crippling your system (switching to xrender and much slower nouveau driver) is not a solution.
What works for me flawlessly for more than a week on KDE Neon:
In file:
/lib/systemd/system/sddm.service
Add:
ExecStartPre=/bin/sleep 10
After [Service]
The problem apparently is that something SDDM needs is not initialized before is starts, so delaying SDDM by 10 sec is adequate workaround. Perhaps it could be less, but it doesn't bother me as long as I don't have to log out/log in manually.
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[Vadym Stupakov]

Thank you, Witold Burkiewicz, it is really helpful workaround.
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