kwin_opengl_test crashed with SIGSEGV in XF86DRIQueryVersion()

[Volodymyr Kolesnykov]

Binary package hint: kdebase-workspace

Happened after upgrade from 10.10 to 11.04

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: kde-window-manager 4:4.6.1-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-7.39-server 2.6.38
Uname: Linux 2.6.38-7-server x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Fri Apr 1 06:49:02 2011
ExecutablePath: /usr/lib/kde4/libexec/kwin_opengl_test
ProcCmdline: /usr/lib/kde4/libexec/kwin_opengl_test
ProcEnviron:
 LANGUAGE=ru_RU:ru
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f104a241dce <XF86DRIQueryVersion+174>: mov 0x4(%rax),%eax
 PC (0x7f104a241dce) ok
 source "0x4(%rax)" (0x00000004) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: kdebase-workspace
StacktraceTop:
 XF86DRIQueryVersion () from /usr/lib/fglrx/libGL.so.1
 XF86DRIQueryExtension () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 glXQueryVersion () from /usr/lib/fglrx/libGL.so.1
Title: kwin_opengl_test crashed with SIGSEGV in XF86DRIQueryVersion()
UpgradeStatus: Upgraded to natty on 2011-04-01 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin netdev plugdev sambashare vboxusers

[Felix Kuehling (felix-kuehling)]

Please attach your /var/log/Xorg.0.log and /etc/X11/xorg.conf.

I suspect that after the update you're not using the fglrx driver in the Xserver for some reason. But the fglrx libGL is active at the same time. The fglrx libGL is incompatible with the open-source X drivers.

[Apport retracing service (apport)]

StacktraceTop:
 XF86DRIQueryVersion () from /usr/lib/fglrx/libGL.so.1
 XF86DRIQueryExtension () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/fglrx/libGL.so.1
 glXQueryVersion () from /usr/lib/fglrx/libGL.so.1

[Felix Kuehling (felix-kuehling)]

As I suspected, you're running the "radeon" 2D driver with the "fglrx" 3D driver, which don't work together. "fglrx" is commented out in xorg.conf and replaced with "ati". Revert that change, reboot and all should be well.

[Volodymyr Kolesnykov (sjinks)]

Yes, works now, thank you!