[Bug 1325801] [NEW] 用Ｕ盘制作启动盘，不能启动，提示信息：gfxboot.c32: not a COM32R Image boot:

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Paul White (paulw2u):

? ??UK 14.10 6-2 dailybuild 32 ?
?????????? ?????????????
? ??????????????????????fxboot.c32: not a COM32R Image boot: ?????

** Affects: ubuntukylin
Importance: Undecided
Status: New


** Tags: iso-testing kubuntu ubuntukylin utopic-pre-alpha1

[Ma Jun]

** Summary changed:

- ???????????????????gfxboot.c32: not a COM32R Image boot:
+ failed to boot from USB disk with error: gfxboot.c32: not a COM32R Image boot:

** Description changed:

? ??UK 14.10 6-2 dailybuild 32 ?
?????????? ?????????????
? ??????????????????????fxboot.c32: not a COM32R Image boot: ?????
+
+ this bug is similar with Bug #645818, but we cannot confirm whether they
+ are the same. If we type "live" and press enter, we can enter live
+ mode.
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Title:
failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[jiaowen520li]

Ubuntu 14.04 Daily-0610.1 & UK 14.04
Daily-0610?U???????????????????boot:?????live????live?????live?????????(?????????????)?
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Title:
failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[Paul White]

An update on the Kubuntu daily image - after typing live at the command
prompt I do now enter a live session and am given the option of trying
Kubuntu or installing Kubuntu.

** Also affects: usb-creator
Importance: Undecided
Status: New
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[Paul White]

** Tags added: ubuntu-desktop-next
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[Jack Yu]

** Changed in: ubuntukylin
Importance: Undecided => Critical

** Changed in: ubuntukylin
Milestone: None => utopic-alpha1
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[Paul White]

** Tags added: xubuntu
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[Paul White]

** Tags added: ubuntu-gnome
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[Jack Yu]

** Changed in: ubuntukylin
Status: New => Fix Released
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[Jack Yu]

** Changed in: ubuntukylin
Status: Fix Released => Triaged
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[Paul White]

** Tags added: lubuntu
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[Walter Lapchynski]

i would recommend first checking the md5 of the iso AND the usb against
the published md5. if it fails, it is an error in either the download
process (iso fails) or the usb creation (usb fails). try a re-download
or a re-creation, depending on what's appropriate.

assuming that's no problem, i'd try it out on a different machine (or
perhaps a different virtual machine).

failing that, and assuming everyone is using usb-creator-kde, it should
be checked against usb-creator-gtk. i doubt there's any difference, but
maybe. if that fails, too, then the next step would be to try unetbootin
and dd.

if there's a consistent problem on all machines and all methods of
creating the usb, i would file the bug against syslinux, since that
suggests the issue is with the iso itself. i would do the same if it is
specific to a particular machine, although we might want to dig deeper
to find out what specifically is the issue (perhaps some driver or
something).

if one usb creation method works where others don't, the bug should be
filed against the ones that don't work. i have found in general the
unetbootin provides pretty good results and dd never fails.

hope that helps!
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[Walter Lapchynski]

oh and if the problem is the usb creation method, and especially if it's
usb-creator-kde, i wouldn't call it a bug against the lubuntu in the iso
qa tracker for future tests.
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[Paul White]

I've just tried to create USB images on two Kubuntu 14.04 PCs using USB
Creator and the problem persists. This is using Lubuntu image 20140623.1
(64-bit).

I've also tried using UNetBootin and I find that I boot into a live
desktop without any trouble.

The problem is clearly with the creation method and not the downloaded
images themselves. I thought I was confirming someone else's bug report
with findings of my own and I apologise for not using an alternative
method. Kubuntu's USB Creator has always been reliable in the past so I
had no reason to suspect that application has suddenly started to
consistently fail.

I suggest that the focus of this bug report turns to the method of
creating images rather than trying to find fault with the images
themselves.

UNetBootin will be used for future testing. Thanks for your interjection
Walter.
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[Paul White]

** Also affects: usb-creator (Ubuntu)
Importance: Undecided
Status: New

** No longer affects: usb-creator
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[Fabio Marconi]

** Changed in: usb-creator (Ubuntu)
Status: New => Triaged

** Changed in: usb-creator (Ubuntu)
Importance: Undecided => Critical

** Changed in: ubuntukylin
Milestone: utopic-alpha1 => utopic-alpha2
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[Fabio Marconi]

Not reproducible in Vbox or CDROM
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[Fabio Marconi]

@ Paul White
Hi, I just tried with unetbooting reproducing this same issue.
I reassign to Casper and Ubuntu CD Images

** No longer affects: ubuntukylin

** Package changed: usb-creator (Ubuntu) => casper (Ubuntu)

** Also affects: ubuntu-cdimage
Importance: Undecided
Status: New
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[Fabio Marconi]

** Tags added: utopic
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[Søren Holm]

Ok .... basically the quick fix for me was to copy
/usr/lib/syslinux/gfxboot.c32 onto the USB-disk to match the version of
syslinux mbr actually installed on the USB-flash.

I guess a plausible fix would be to just copy over all syslinux files
and not used those present in the iso-file from the beginning.
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[Daryl Hughes]

This issue also continues in Unetbootin as default boot download Ubuntu
14.04
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[Dmitriy "Simplehuman" Fedorov]

I'm also affected in Utopic and Trusty on different configurations, using usb-creator-gtk. With Trusty and Utopic (daily, and Unity-Next daily images). Images are not corrupt.
Using Unetbootin in Utopic shows the same result
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[Dmitriy "Simplehuman" Fedorov]

This issue seems to be random. After formatting\creating USB disk by
usb-creator-gtk for over 7 times - it is working.

Workaround in comment #11 didn't work for me.
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[denkin]

confirm this problem
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[kyt]

? ??UK 14.10 beta1 64bit
?????Lenovo YangtianM6600N
? ??????????????????????fxboot.c32: not a COM32R Image boot???live?????live??
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[Elfy]

seeing the same xubuntu beta
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[Arthur Schiwon]

Same issue with Kubuntu 14.10 Beta 1 (Plasma 5 Preview), created using
usb-creator-kde. I checked the MD5, which is correct.
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[Arthur Schiwon]

Workaround as suggested in #11 works for me by copying the file from
Kubuntu 14.04 to the right spot on the USB disk.
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[shijing]

I created using usb-creator-gtk for the latest iso 2014/9/3(ubuntu &
ubuntukylin ), still have the problem.
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[shijing]

** Also affects: casper
Importance: Undecided
Status: New

** Project changed: casper => ubuntukylin

** Changed in: ubuntukylin
Assignee: (unassigned) => Jack Yu (jackyu)
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[shijing]

I've just tried to create USB images on ubuntukylin 14.10 PCs using dd and without any trouble. This is using ubuntukyin image 20140911 (64-bit).

Using Unetbootin the problem persists.
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[Jack Yu]

** Changed in: ubuntukylin
Assignee: Jack Yu (jackyu) => Joey Zheng (jzheng)

** Changed in: ubuntukylin
Milestone: None => utopic-final

** Changed in: ubuntukylin
Importance: Undecided => Medium
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[Joey Zheng]

@shijing and @jackyu, I have tried unetbootin with image 20140914. There
is no any problems. Can you have a try again? And also can you try again
with usb-creator again?
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[Joey Zheng]

BTW, the image I am using is Ubuntu utopic 64bits but not Ubuntu Kylin.
Here is the link http://cdimage.ubuntu.com/ubuntu-desktop-next/daily-
live/20140914/utopic-desktop-amd64.iso.
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[shijing]

@joey
I created using usb-creator-gtk for the latest iso 2014/9/14(ubuntu & ubuntukylin 32&64bit ), very strange.

I installed ubuntu& UK 64bit on lattop HP-Pavilion-Sleekbook-15-PC , it works.
but on the other mache for example thinkpad-201i, dell inspiron, lenovo,it did not work.

for ubuntu & uk 32bit no matter what machine ,it did not work . it
wierd.

I also used unetbootin for latest iso 2014/9/14 ubuntukylin 64bit , only works on HP-Pavilion-Sleekbook-15-PC, other machine
did not work.
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[Joey Zheng]

@shijin
Thank you. The information is very helpful and useful!
Can you help have a further check in BIOS if the machine are in UEFI mode or legacy mode? And run "find ./ -name gfxboot.c32 -exec md5sum {} \;" on your usb stick, past the result here. Thanks in advance.
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[shijing]

@Joey, I tested dailybuild iso (915), using usb-creator-gtk on dailybuild system, no matter what machine (ubuntukylin 32bit or 64bit) it works.
but using usb-creator-gtk on 1404.1 system, part of machines was not.

I contrast the version of usb-creator-gtk on the two systems.
1410 usb-creator-gtk version is 0.2.62, 1404.1 the application version is 0.2.56.2
It is perhaps for this reason?
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[Joey Zheng]

@shijing, Good to know that you figure out a workable way. We may be
able to close this issue, but before we can close this issue, can you
still help compare the two USB sticks and show the differences? My
assumption is that something else is root cause maybe.
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[Anthony Wong]

** Changed in: ubuntukylin
Milestone: utopic-final => utopic-beta2
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[Erick Brunzell]

I performed three tests this AM. In all cases I used my stable fully
updated Trusty to create the live USB's and the versions of 'usb-
creator-gtk' and 'unetbootin' used are the standard versions available
in the Trusty repos. Tests were performed on bare metal:

Intel Atom CPU 230 @ 1.60GHz
Intel 82945G/GZ Integrated Graphics Controller (rev 02)
Intel N10/ICH 7 Family High Definition Audio Controller (rev 01)
Realtek RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
2GB DDR2 RAM

In test #1 I created an Ubuntu Utopic 20140922 i386 live USB using 'usb-
creator-gtk' (aka: Startup Disk Creator) and attempting to boot the live
USB produced this bug.

In test #2 I created an Ubuntu Utopic 20140922 i386 live USB using
'unetbootin' and the live USB boots as it should.

In test #3 I created an Ubuntu 14.04.1 live USB using 'usb-creator-gtk'
(aka: Startup Disk Creator) and the live USB boots as it should.

Hope that's helpful. It seems that whatever is borked in the Utopic
iso's does not effect UNetbootin but does effect Startup Disk Creator.
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[Erick Brunzell]

I performed another test, this time using the Ubuntu Utopic version of
'usb-creator-gtk' to create an Ubuntu Utopic 20140922 i386 live USB and
it boots as it should. So right now I'd have to say, "Utopic live USB's
created with the Trusty version of 'usb-creator-gtk' fail to boot and
display the text reported in this bug".

I'll try and test using the Precise version of 'usb-creator-gtk' as soon
as possible.

I pulled up the Utopic changelog for 'usb-creator-gtk' which I'll
include but it's too technical for me.

** Attachment added: "usb-creator_utopic_changelog"
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1325801/+attachment/4211582/+files/usb-creator_utopic_changelog
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[Erick Brunzell]

An Ubuntu Utopic 20140922 i386 live USB created in Precise using Startup
Disk Creator also fails with the error reported here, so I'd have to
amend that last statement to say, "Utopic live USB's created with the
Trusty or Precise versions of 'usb-creator-gtk' fail to boot and display
the error reported in this bug".

Sort of leaves me wondering if we need to fix the image or if we should
do separate SRU's for both Precise and Trusty 'usb-creator-gtk'???

It would be nice if someone could try creating a Utopic live USB in
Windows (probably both Win 7 and Win 8) following the official USB
creation methods linked to on the main download page. I have no Windows
machines to test with.
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[Erick Brunzell]

I did not realize that we were now recommending UUI for creating live
USB's in all versions of Windows but that is the case:

http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows

So I dusted off a seldom used Win XP and created an Ubuntu Utopic
20140922 i386 live USB using UUI and it boots fine.

So I'm fairly confident saying, "Utopic live USB's created with the
Trusty or Precise versions of 'usb-creator-gtk' fail to boot and display
the error reported in this bug".

It would be nice if someone could verify that though.
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[Joey Zheng]

@Erick, Thank you very much for the information. Those are really very
useful and helpful. Can you please download
http://launchpadlibrarian.net/183886438/usb-creator-
common_0.2.62_amd64.deb and http://launchpadlibrarian.net/183886439/usb-
creator-gtk_0.2.62_amd64.deb, and use "sudo dpk -i" to force install
them on your 14.04 system to see if this issue still exists or not?
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[Joey Zheng]

Those package are the ones from utopic. As far as I tried, I still can
reproduce this issue. So just from my point of view, this is not just an
issue from "usb-creator".
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[shijing]

@Joey
I did live usb using usb-creator-gtk ( 9.23 Ubuntukylin i386 dailybuild iso ) In two different systems?1404.1 and 1410?,
the usb-creator-gtk version in 1404.1 is 0.2.56.2 and in 1410 is 0.2.62.
I used "diff -Nur dir1 dir2 >diff.patch " order output diff file in attachment.
at the same time I paste the picture of two usb dirs.


** Attachment added: "diff.png"
Loading Image...
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[shijing]

** Patch added: "diff.patch"
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1325801/+attachment/4212951/+files/diff.patch
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[Ma Jun]

On the one created on 1404.1 the file ldlinux.c32 gets lost. Does it
show the relation with UEFI config?
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[Erick Brunzell]

@Joey, sorry for the delay. You're right, just upgrading 'usb-creator*'
does NOT do the trick. I even tried changing the Trusty sources to
Utopic, then updating the cache, then installing 'usb-creator-gtk' in
case some other dependency needed upgrading. It was still not good.
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[Ubuntu Foundations Team Bug Bot]

The attachment "diff.patch" seems to be a patch. If it isn't, please
remove the "patch" flag from the attachment, remove the "patch" tag, and
if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch
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[Joey Zheng]

remove tag "patch" as "diff.patch" is not a patch for fixing this issue,
but it is for us to help see what the root cause is.

** Tags removed: patch
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[Brian Murray]

It may be helpful to add the log file for usb-creator, which is located
in ~/.cache/usb-creator.log, to the the bug report to help track down if
it is a problem with usb-creator.

** Also affects: casper (Ubuntu Utopic)
Importance: Critical
Status: Triaged
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[Brian Murray]

Additionally, testing creating a USB stick with dd would be really
helpful. Thanks!
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[Erick Brunzell]

For comparison here's the requested log from my Utopic that was used
more than once to successfully create a Utopic live USB. I'll boot into
my Trusty that continually produced bad Utopic live USB's momentarily.

** Attachment added: "usb-creator.log"
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1325801/+attachment/4215442/+files/usb-creator.log
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[Erick Brunzell]

Here is the log from my Trusty that most recently made bad Utopic live
USB's.

I'll have to study how to create a live USB with dd, something I should
learn anyway.

** Attachment added: "usb-creator.log"
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1325801/+attachment/4215456/+files/usb-creator.log
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[Erick Brunzell]

Using dd to create a live USB works just fine in that same Trusty that
spits out bad live USB's using usb-creator.
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[shijing]

** Patch removed: "diff file"
https://bugs.launchpad.net/ubuntukylin/+bug/1325801/+attachment/4212951/+files/diff.patch
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[shijing]

diff 14.04.1 and 14.10 system usb-creator-gtk application , 14.04.1
looks like less a file .

** Attachment added: "diff different system usb-cretaor-gtk"
https://bugs.launchpad.net/ubuntukylin/+bug/1325801/+attachment/4215569/+files/diff%20%20different%20system%20usb-cretaor-gtk
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[Anthony Wong]

** Changed in: ubuntukylin
Status: New => Triaged

** Changed in: ubuntukylin
Milestone: utopic-beta2 => utopic-final
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[Brian Murray]

@Erick - your last comment regarding dd isn't clear to me. Did dd
create usable live USB sticks from Trusty and Utopic?
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[Erick Brunzell]

@Brian Murray, I didn't try using dd in Utopic because using 'usb-
creator' in Utopic to create a Utopic live USB has never failed since I
began testing on or around 20140922.

The only failures I've been able to reproduce can be summed up as,
"Utopic live USB's created with the Trusty or Precise versions of 'usb-
creator-gtk' fail to boot and display the error reported in this bug".

Creating a Utopic live USB using dd in Trusty produced a bootable live
USB with no errors. I haven't yet tried using dd in Precise to create a
Utopic live USB but I don't mind doing it if you'd like.

BTW if someone else wants to try it I found it quite simple:

sudo dd if=path/to/image.iso of=/dev/sd#

So my archived 20140922 iso was on the Desktop, and the desired flash
drive was /dev/sdc so;

sudo dd if=Desktop/utopic-desktop-i386.iso of=/dev/sdc

Wish I'd taken time to learn that sooner.

Oh, so far I've been using my archived 20140922 iso for all of the
testing but going forward I'll try the latest daily images just in case
something unapparent changes.
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[Sam]

I went to try a fresh install of Ubuntu Gnome 14.10 and used Unetbootin to write the ISO as usual.
The USB would not even boot so I tried one more time and it did the same.
I tried using Startup Boot Creator and I had full menu and everything worked as it should. Never had Unetbootin fail and Startup Boot Creator work.
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[Elfy]

All done from an up to date Utopic install

dd - works
usb-creator-gtk - works

unetbootin - failed with com32 error. <Tab> at boot: prompt gives me the
option of unetbootindefault and ubnentry0 to ubnentry9
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[Philippe Clérié]

I am also affected by this issue using utopic kubuntu-plasma-5, built
2014-10-04.
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[Philippe Clérié]

Regarding #50: I copied /usr/lib/syslinux/gfxboot.c32 to USB/syslinux
and the USB key worked as expected.
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[Chris Hermansen]

Regarding #51: in today's 14.10 daily I was affected by the same
problem. I copied /usr/lib/syslinux/gfxboot.c32 from my 14.04 system
into the usb /syslinux and it now boots fine.

This is 14.10 Ubuntu 64. The boot disk was created on a 14.04 Ubuntu 64
system, up to date, with usb-creator-gtk.
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[bedfojo]

** Tags added: trusty
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[Erick Brunzell]

Less than 24 hours to go before Utopic is released :^(

Is this not a regression to bug #1112878?

Should we not at least mention it in the release notes?
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[sudodus]

I checked that the current 'utopic-desktop-i386.iso' works when flashed
to USB with mkusb., which it should according to comment #49 by elfy -
dd works.

-o-

What about the alternatives from Windows? If there are problems with
Unetbootin, I would guess that

http://sourceforge.net/projects/win32diskimager/

will work (because it copies/flashes/clones the iso file in the same way
as dd in linux).
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[Colin Watson]

As far as I can tell, it's not so much that it's a regression in usb-
creator or in the images, it's that the interface between the core of
syslinux and its COM32 modules is incompatible between 14.10 and earlier
versions; this means that running usb-creator from a 14.10 system to
write a 14.10 image works fine (e.g. comment #49) but it doesn't work if
you're running it from a 14.04 or earlier system, and I suspect that it
also doesn't work if you try to use usb-creator from a 14.10 system to
write a pre-14.10 image. And no, Erick, it is not a regression from bug
1112878 even though it has the same final symptom - please don't
conflate those two bugs.

This is obviously suboptimal and if we (relevant developers) had noticed
this in time then we should certainly have fixed it in both 14.10 and
earlier versions to reduce confusion. The least invasive fix is
probably to copy the relevant .c32 files from the host system as well as
running syslinux on the image, and comment #52 indicates that this
approach works fine. However, since the most pressing need is to fix
this in updates to usb-creator in 14.04 and earlier releases, there's no
reason for it to block the release of 14.10.

I will write up something for the release notes, and see if we can get
this patched up reasonably quickly.

** Package changed: casper (Ubuntu Utopic) => usb-creator (Ubuntu
Utopic)

** Also affects: usb-creator (Ubuntu Lucid)
Importance: Undecided
Status: New

** Also affects: usb-creator (Ubuntu Trusty)
Importance: Undecided
Status: New

** Also affects: usb-creator (Ubuntu Precise)
Importance: Undecided
Status: New

** Changed in: usb-creator (Ubuntu Lucid)
Status: New => Triaged

** Changed in: usb-creator (Ubuntu Precise)
Status: New => Triaged

** Changed in: usb-creator (Ubuntu Trusty)
Status: New => Triaged

** Changed in: usb-creator (Ubuntu Lucid)
Importance: Undecided => Critical

** Changed in: usb-creator (Ubuntu Precise)
Importance: Undecided => Critical

** Changed in: usb-creator (Ubuntu Trusty)
Importance: Undecided => Critical
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[Colin Watson]

And, to be clear, you need a 14.10 (etc.) *system*, not just usb-
creator. The relevant packages would be the various syslinux-related
binaries.
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[Colin Watson]

I've release-noted this now, here:

https://wiki.ubuntu.com/UtopicUnicorn/ReleaseNotes#Boot
.2C_installation_and_post-install
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[Brian Murray]

Somebody may also want to update the usb-creator section of
https://help.ubuntu.com/community/Installation/FromUSBStick.
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[Erick Brunzell]

Thanks Colin.
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[Brian Murray]

I updated the wiki page I mentioned.
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[Dimitri John Ledkov]

time for syslinux-semi-legacy & syslinux-future packages in addition to
the syslinux-legacy and syslinux packages?!
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[Anthony Wong]

** Changed in: ubuntukylin
Milestone: utopic-rc => None
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[Chris Hermansen]

Wow the image released contains this bug! Just tried it on my System76
gazelle 8.
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[Chris Hermansen]

Sorry I should mention that I created the bootable USB on a 14.04
system.

The workaround, that is typing "live" into the boot prompt, eventually
yields a live session.

This is Ubuntu 14.10 downloaded today from the regular release page.
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[RaviTeja]

Yes, I tried running "live-install" at the boot: prompt and it worked.
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[sudodus]

I added some text at this web address

https://help.ubuntu.com/community/Installation/FromUSBStick#Known_Issues

which points to mkusb (for linux) and Win32DiskImager (for Windows). I
made a new wiki page with screenshots to help in this acute situation
until the Startup Disk Creator and Unetbootin work again.

https://wiki.ubuntu.com/Win32DiskImager/iso2usb
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[John Scott]

I think this is a bug in UNetbootin. I found that it is fixed by using
the latest version of UNetbootin which can be downloaded from
SourceForge.
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[Erick Brunzell]

I've had no problem with Unetbootin, only usb-creator*.
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[Chris Hermansen]

Ahem sorry to all I did not read the last ten or so comments.

Having more carefully read through them, and having re-read the earlier
notes, I have (I believe) a more useful question.

Would it not be reasonable to mention on the release notes and related
pages that it may be possible to use usb-creator-gtk on a 14.04 system
to make a 14.10 bootable usb stick provided that the user is prepared to
type "live" when informed that gfxboot.c32 is not bootable, or is
prepared to copy the gfxboot.32 file from the 14.04 system onto the usb
stick prior to use?
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Title:
failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[pa_card]

I have been fiddling for two days with this issues trying many different
methods and iso.

My results are as follow:
- error COM32 with both Xubuntu 14.04 and 14.10 prepared with Unetbootin (ver. 603-1 in repository, I saw there is a new version out on their website but I didn't compile it). The fix of typing 'install' on the prompt did not work either.
- error with dd method: 'no syslinux.bin'
- success (finally!) with the least likely option: usb-creator-gtk.

I hope this helps.
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Title:
failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[Elfy]

with unetbootin you can use unetbootindefault at boot:

it doesn't give you any options - but it does boot to the live desktop
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[sudodus]

@pa_card:

If you got this error with the dd method: 'no syslinux.bin', I think you
copied/flashed/cloned the iso file to a partition rather than to the
whole drive.
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Title:
failed to boot from USB disk with error: gfxboot.c32: not a COM32R
Image boot:

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[Marc]

I have a similar problem, see
https://www.kubuntuforums.net/showthread.php?66770-Live-USB-does-not-boot&p=361703#post361703

I tried some more things, and the only thing I get to work is with the dd command:
- Kali Linux
- Ubuntu 14.04.1 iso image
- Kubuntu 14.04.1 iso image

What does not work: (dd nor usb creator nor Unetbootin)
- Kubuntu 14.10 (I even borrowed a dvd RW from a neighbour and burned the image on the dvd)
- Kubuntu 14.04 initial iso image
- Kubuntu 15.04 daily
- mint 17

As 14.04 is an LTS, IMO the problem should be corrected there as wel.
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[sudodus]

Hi Marc (mbbs)

In the cases where dd does not make a bootable drive for you, there is
another problem. This bug does not affect the dd method. Please describe
your problem in detail at the Ubuntu Forums and I think you can receive
help from there.

-o-

I tried a couple of days ago. Unetbootin worked. This bug was still
there in updated 12.04.5 and 14.04.1 systems affecting attempts to boot
14.10 with pendrives prepared with the Ubuntu Startup Disk Creator.
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[Martin Wood]

The /isolinux/gfxboot.c32 file in 14.10 is 10.4kB. The same file in 14.04 is 21.3kB.
I have remade the iso image after replacing gfxboot.c32 with the one from 14.04 and usb-creator now produces working pendrives.
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[sudodus]

I've tried 'Disks' alias gnome-disks in Lubuntu 14.04.1 and Vivid.

I could make it create an iso file from a partition, but not from the
whole drive. Trying from the whole drive gave me an error both running
as a regular user and with sudo. (I tested with a Tiny Core iso file,
which is small so it was fast.)

When I restored from the image of the partition I got a working boot
drive. (I cloned the Ubuntu mini.iso in between so that the pendrive was
changed.) I think this is not logical (and not corresponding to how dd
is used). Restoring a partition should not restore the whole drive, but
I guess it is intended to work this way.

I could make it flash, clone alias 'restore' a boot USB drive from another iso file (I tested with the Ubuntu mini.iso (because it is small
so it was fast).

-o-

Conclusion:

I'm glad that I learned about this feature of 'Disks'. It is certainly
possible to use in order to make a USB boot drive. There is an extra
'final warning window', so it should be safe enough to use. And best of
all, it offers a working solution, when the Startup Disk Creator suffers
from this really bad bug (# 1325801) plus several minor bugs.

-o-

But of course, I still think that my mkusb is better ;-)

One important extra feature of mkusb is the ability to use general
compressed image files (an iso file often contains the compressed
container squashfs, but is not itself compressed). Another extra feature
of mkusb is the ability to check if the content of the iso file matches
that of the pendrive, and suggest updating for iso-testing. And there
are several informative windows including a final warning with red
background.
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[Yogu]

I can confirm that the same problem arises when running usb-creator on
Ubuntu 14.10 to write an older operating system (boot-repair in this
case).
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[da6930p]

Why are we bothering with this error? Is not this a SHAME?

All time when I try people to use Linux, Ubuntu installation sucks!
Especially after saying 5 minutes is enough for installation I was
unable to boot. Trying to work around for bugs.

I think Canonical should have some policies for this kind a thing! Don't
make us shame on other f**king ms users...
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[Tiago Zanus]

Same problem with Kubuntu-Plasma5-14.10-amd64, using USB creator. Trying
now UNetbootin
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[jiaowen520li]

** Changed in: ubuntukylin
Milestone: None => vivid-alpha1
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[jiaowen520li]

** Changed in: ubuntukylin
Milestone: vivid-alpha1 => None
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failed to boot from USB disk with error: gfxboot.c32: not a COM32R
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[Ravi Teja]

Also reproducible when using the below mentioned versions and 14.10 ISO:
http://releases.ubuntu.com/14.10/ubuntu-14.10-desktop-amd64.iso.torrent

:~$ usb-creator-gtk --version
0.2.23

:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty

It really sucks when I try to convince people about ubuntu having the
fastest installation and it's unable to boot
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[Pavel]

Similar issue with 14.04.1 ISO:
http://releases.ubuntu.com/trusty/ubuntu-14.04.1-desktop-amd64.iso.torrent
written with usb-creator-kde version 0.2.62 from utopic.
The message I get is "failed to load com32 file gfxboot.c32".
Typing "live" boots the live system.
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[Salustiano Silva]

The solution presented on comment #11 worked for us with
"ubuntu-14.10-server-i386.iso" with an USB Boot PEN created by
"Universal-USB-Installer-1.9.5.5.exe" under Windows 8.1.

We've copied the "gfxboot.c32" file from a "Linux Mint 17 Qiana" distro.

cp /usr/lib/syslinux/gfxboot.c32 /media/user/UUI/isolinux/
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[Yu Ning]

Hi guys, attached is a patch which will sync the *.c32 files from host
system to the target. With this patch I create a 14.10 usb stick on a
14.04 machine, and the usb stick can boot with Legacy BIOS successfully
without any error.

BTW, I wonder if we could fix this issue in a different way. Per previous comments we know the root cause is that the mbr on the usb stick is installed from the host system, which may be incompatible with the syslinux files included in the CD/ISO. So a possible fix is:
1. mount the CD/ISO to self.source (this is already done in current code)
2. mount the squashfs image self.source + 'casper/filesystem.squashfs' to self.sourcefs
3. install syslinux boot loader in the self.sourcefs chroot instead of host system
4. burn self.sourcefs/usr/lib/legacy/mbr.bin instead of /usr/lib/legacy/mbr.bin

Not sure if step 3 is necessary. By doing this we can make sure the mbr
and all the syslinux files are in the same version, the version used in
the source CD/ISO.

However to achieve this we have to change the dbus interface since
previously the source mount point is not passed to the InstallBootloader
dbus method. I'll make some actual test and feedback later.

** Patch added: "sync-syslinux-c32-files.patch"
https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1325801/+attachment/4298167/+files/sync-syslinux-c32-files.patch
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