[Bug 1573345] [NEW] Dual monitor loses settings after screen sleep

[Richard Johnson]

Public bug reported:

If I leave my computer until the desktop locks & then the screen goes
black, when I log back in I still have dual monitors. however my config
isn't used. It goes to using laptop display as main display & HDMI as a
secondary display. Weird thing is, it does use the screen positioning
portion of the config & the resolution, just moves bar to other screen &
HDMI screen is just black. This happens every time, so yes it is
reproducible.

Reproducible: Always

Steps to Reproduce:
1. Let screen lock & go black (aka sleep)
2. Move mouse to wake screen up
3. Log in to unlock desktop

Actual Results:
HDMI is no longer primary, laptop screen becomes primary. HDMI screen doesn't have desktop background settings nor panel, nor right click functions.

Expected Results:
My display settings should be used where HDMI is primary & laptop is secondary. Plasma panel should be on the HDMI screen & not the laptop screen.

My current work around is after unlocking the desktop log out & log back
in. Everything goes back to normal until the next time the screen goes
to sleep.

** Affects: kscreen
Importance: Unknown
Status: Unknown

** Affects: kscreen (Ubuntu)
Importance: Undecided
Status: New

** Bug watch added: KDE Bug Tracking System #362058
https://bugs.kde.org/show_bug.cgi?id=362058

** Also affects: kscreen via
https://bugs.kde.org/show_bug.cgi?id=362058
Importance: Unknown
Status: Unknown
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Title:
Dual monitor loses settings after screen sleep

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------------------------------------------------------------------------
On 2016-04-22T01:41:06+00:00 Rjohnson-m wrote:

If I leave my computer until the desktop locks & then the screen goes
black, when I log back in I still have dual monitors. however my config
isn't used. It goes to using laptop display as main display & HDMI as a
secondary display. Weird thing is, it does use the screen positioning
portion of the config & the resolution, just moves bar to other screen &
HDMI screen is just black. This happens every time, so yes it is
reproducible.

Reproducible: Always

Steps to Reproduce:
1. Let screen lock & go black (aka sleep)
2. Move mouse to wake screen up
3. Log in to unlock desktop

Actual Results:
HDMI is no longer primary, laptop screen becomes primary. HDMI screen doesn't have desktop background settings nor panel, nor right click functions.

Expected Results:
My display settings should be used where HDMI is primary & laptop is secondary. Plasma panel should be on the HDMI screen & not the laptop screen.

My current work around is after unlocking the desktop log out & log back
in. Everything goes back to normal until the next time the screen goes
to sleep.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kscreen/+bug/1573345/comments/0


** Changed in: kscreen
Status: Unknown => New

** Changed in: kscreen
Importance: Unknown => Medium
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Title:
Dual monitor loses settings after screen sleep

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[JohnEverest]

I have this bug. It was in Kubuntu 15.04 and 15.10. It occurs after some
system changes and often after an update. I have not been able to find
exactly what changes cause the loss of configuration.

I have dual monitors on an Nvidia GTX750 graphics card.
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Title:
Dual monitor loses settings after screen sleep

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[Mgraesslin]

this sounds like your XServer "loses" the output - which should not
happen on power management. Could you please check whether that's the
case in e.g. /var/log/Xorg.0.log?
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Title:
Dual monitor loses settings after screen sleep

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[G. Guzmics]

I think I can confirm this.
I did not have this behaviour in 15.04, which I used until recently with the same setup for years.

When I upgraded to xenial, I got the same behaviour, just the other way around: I do have primary screen set to the laptop (LVDS1), while my monitor is secondary (using a larger resolution).
Upon disconnecting HDMI and closing the lid, plasmas main bar gets resized as if its on the external monitor (so it gets moved over and back?), reconnecting hdmi with closed lid however moves primary screen to the monitor - otherwise I would not have even realized, why the main bar gets resized in such a weird fashion.

Logging out and back in fixes the problem.
Graphics card is intel.
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Title:
Dual monitor loses settings after screen sleep

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[cengopon]

Similar here I guess:
Dual screen (different resolutions and sizes). After sleep, windows that were opened are not found were they were (on the other screen, and on other workspace).

Something else: sometimes wake up does not work properly. Have to go TTY
and back to GUI to get my desktop.

This is with Ubuntu 16.10, NVIDIA GF119, driver NVIDIA 367.57
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Title:
Dual monitor loses settings after screen sleep

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[Mike]

Kubuntu 16.04, KDE plasma 5.5.5, Qt 5.5.1

Using Sky Lake Integrated Graphics with driver=i915_bpo

Using dual monitors with different configurations and resolutions. On waking the screens the desktop shown on HDMI2 monitor crashes. The background is black and the KDE panel is gone. The primary display is unaffected. I am still able to run application windows on the crashed desktop and the app windows will take up the space of the missing panel. To resolve I run

killall plasmashell; sleep 3; plasmashell

This brings the desktop wallpaper and panel back as expected and
application windows on the crashed desktop will resize to fit the panel.
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Title:
Dual monitor loses settings after screen sleep

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[Launchpad Bug Tracker]

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

** Changed in: kscreen (Ubuntu)
Status: New => Confirmed
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Title:
Dual monitor loses settings after screen sleep

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[AB]

This is totally happening for me since a long while now. It was there in 17.x , it is there in 18.04 beta.
No matter if we use KDE or Cinnamon.
No matter if we use noveau or NVIDIA drivers.

I have 2 monitors for my desktop, a big one in front and a smaller one
on the left. The big one is supposed to be the main desktop screen.

Once the screen saver timer kicks in to turn off the monitors, the big
one never comes back to life after entering the password (can only enter
it on the secondary-left side monitor). The big one stays without any
image, it even says there is no signal when turned on/off.

Have to reboot to fix it.
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Title:
Dual monitor loses settings after screen sleep

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[AB]

update: Executing "xset -dpms" at startup
(System Settings -> Startup and Shutdown -> Automatically Started Applications)
solves the problem (on KUbuntu 18.04 Beta + NVIDIA-390 Drivers, didn't test the other mentioned ones) for me.
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Title:
Dual monitor loses settings after screen sleep

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[Kenny Stier]

I have the same issue, only I'm running the 18.04 beta on Gnome.
I have yet to try the workaround.
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Dual monitor loses settings after screen sleep

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[Kenny Stier]

I can confirm that the "Executing "xset -dpms" at startup" workaround
fixes the issue for me. I don't believe the issue is with kscreen
though, as I'm running a Gnome stack and had the same issue starting
with 18.04.
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Title:
Dual monitor loses settings after screen sleep

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[[e-mail]]

I used to use two screens with outputs on VGA and DP(with converter to
HDMI as monitor has only HDMI input) and this worked fine as long as I
used it. Now I have upgraded screen and am using two DP where one screen
is 4k and other is using DP2HDMI(same screen as used before).

Previous configuration was fine as screens came up quite swiftly but now
my 4k screen takes longer to show up and this messes up whole config.
(Cairo-dock is showing on left screen in the middle when mouse over
right screen's edge etc..).

I believe this whole thing is down to timing when xorg is expecting all
screens be ready to accept signal and reply with "Ready" signal but
first screen responds faster and second may not respond in time and xorg
believes that screen is off or not available so adjust config
accordingly.

I don't know what dpms at startup does but I can live with this bug for
now as all it does, shuffles my windows all over the place and cairo
dock can be reconfigured quickly.

This bug should be submitted to xorg not kscreen I guess.

CPU: Intel® Core™ i5-3570 CPU @ 3.40GHz × 4
GPU: Intel® Ivybridge Desktop
Base Sys: Debian GNU/Linux 9 (stretch) 64-bit
Gnome: Ver 3.22.2
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Title:
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[Rion]

seems to be the same
https://bugs.kde.org/show_bug.cgi?id=376341

** Bug watch added: KDE Bug Tracking System #376341
https://bugs.kde.org/show_bug.cgi?id=376341
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Title:
Dual monitor loses settings after screen sleep

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