OsLookupColor is unlikely to be relevant here. That's the function
practically all Xorg crashes appear to be in when the crash is missing
debug symbols. So I would advise to ignore OsLookupColor - it just means
we don't have a valid stack trace.
Please try:
1. Look in /var/crash for crash files and if found run:
ubuntu-bug YOURFILE.crash
Then tell us the ID of the newly-created bug.
2. If step 1 failed then look at https://errors.ubuntu.com/user/ID where
ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine.
Do you find any links to recent problems on that page? If so then please
send the links to us.
Please take care to avoid attaching .crash files to bugs as we are
unable to process them as file attachments. It would also be a security
risk for yourself.
** Changed in: nvidia-graphics-drivers-520 (Ubuntu)
Status: New => Incomplete
** Changed in: xorg-server (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1998024
Title:
Xorg crashes on startup if Marco window manager is used
Status in nvidia-graphics-drivers-520 package in Ubuntu:
Incomplete
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
I'm running MATE desktop and I installed NVIDIA GTX 1060 GPU to my
system and Xorg crashes after entering password.
I proceeded to run strace with startx trying to debug this and it
seems that the window manager `marco` does some (yet unknown) command
which causes Xorg to crash with SIGABRT (signal 6) or SIGSEGV (signal
11) and emit stack trace:
0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c)
1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60)
2: ? (?+0x0)
(EE) Segmentation fault at address 0x0
(EE) Caught signal 11 (Segmentation fault). Server aborting
The Xorg itself declares signal 11 but `journalctl --since "5 min ago"` shows
kernel: potentially unexpected fatal signal 6.
kernel: CPU: 2 PID: 20660 Comm: Xorg Tainted: P OE
5.15.0-53-lowlatency #59~20.04.1-Ubuntu
kernel: Hardware name: System manufacturer System Product Name/P8H77-M PRO,
BIOS 1505 10/17/2014
followed with register dump.
Before crashing, process running `marco` also emits warning which I think is
not related to the problem (it may be caused by the fact that I executed marco
with startx instead of mate-session):
Window manager warning: Log level 128: Name
com.canonical.AppMenu.Registrar does not exist on the session bus
Workaround: downgrading to NVIDIA driver version 470 avoids the problem (as
suggested here:
https://ubuntu-mate.community/t/updated-nvidia-settings-now-x-wont-start/24991)
# sudo apt install linux-modules-nvidia-470-lowlatency-hwe-20.04
nvidia-driver-470 linux-modules-nvidia-520-lowlatency-hwe-20.04-
nvidia-driver-520-
I also tried version 515 and it caused the same crash.
I'm using following kernel package: linux-lowlatency-hwe-20.04 (+
linux-tools-lowlatency-hwe-20.04)
I would guess that the bug is in Xorg OsLookupColor() implementation which
gets triggered by recent NVIDIA driver change.
Bug https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1853266
might be related.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nvidia-driver-520 (not installed)
ProcVersionSignature: Ubuntu 5.15.0-53.59~20.04.1-lowlatency 5.15.64
Uname: Linux 5.15.0-53-lowlatency x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Sat Nov 26 21:42:50 2022
EcryptfsInUse: Yes
InstallationDate: Installed on 2019-01-05 (1421 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
SourcePackage: nvidia-graphics-drivers-520
UpgradeStatus: Upgraded to focal on 2022-09-13 (74 days ago)
modified.conffile..etc.init.d.apport: [modified]
mtime.conffile..etc.init.d.apport: 2022-05-19T12:50:20.029158
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