Bug 18191

Summary: Xorg segfault in _swrast_copy_teximage2d
Product: Mesa Reporter: Chris Coulson <chrisccoulson>
Component: Drivers/DRI/i915Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED NOTOURBUG QA Contact:
Severity: normal    
Priority: medium CC: ericdrex
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments: Backtrace
Output of lspci -vvnn
xorg.conf
Xorg.0.log.old

Description Chris Coulson 2008-10-23 13:23:17 UTC 
Created attachment 19830 [details]
Backtrace

This was originally reported at https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/287485 by Eric Drechsel:

"To reproduce I start a failsafe console session, run kwin (kwin has compositing enabled, with opengl backend - no crash with xrender backend).

Xorg backtrace (from startx over ssh):

(EE) intel(0): tried to update DSPARB with both planes enabled!
(EE) intel(0): underrun on pipe B!
(EE) intel(0): underrun on pipe B!
(EE) intel(0): underrun on pipe B!

Backtrace:
0: /usr/bin/X11/X(xf86SigHandler+0x79) [0x80c2ff9]
1: [0xb8045400]
2: /usr/lib/dri/i915_dri.so(intelCopyTexImage2D+0x14a) [0xaf67e83a]
3: /usr/lib/dri/i915_dri.so(_mesa_CopyTexImage2D+0x1d4) [0xaf718334]
4: /usr/lib/xorg/modules/extensions//libglx.so [0xb7b351ca]
5: /usr/lib/xorg/modules/extensions//libglx.so [0xb7b5e36f]
6: /usr/lib/xorg/modules/extensions//libglx.so [0xb7b62c0a]
7: /usr/bin/X11/X(Dispatch+0x34f) [0x808c88f]
8: /usr/bin/X11/X(main+0x47d) [0x8071d1d]
9: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7c44685]
10: /usr/bin/X11/X [0x8071101]
Saw signal 11. Server aborting.
xinit: connection to X server lost.

waiting for X server to shut down"

This is with Mesa 7.2. I will attach the users Xorg.0.log.old, xorg.conf, backtrace and output of lspci -vvnn
Comment 1 Chris Coulson 2008-10-23 13:23:59 UTC 
Created attachment 19831 [details]
Output of lspci -vvnn
Comment 2 Chris Coulson 2008-10-23 13:24:26 UTC 
Created attachment 19832 [details]
xorg.conf
Comment 3 Chris Coulson 2008-10-23 13:24:43 UTC 
Created attachment 19833 [details]
Xorg.0.log.old
Comment 4 Eric Drechsel 2008-12-08 01:26:36 UTC 
Hi, I'm the original reporter. It seems that there was a wrong setting in some kwin related config file, deleting the several kwin configs eliminates the crash. If someone is interested in the particular setting that causes the crash, I can find it by experimentation but otherwise this bug can be closed. Thanks!

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