Re: [Mesa3d-dev] Crash in glXChooseVisual as of today

[Brad K. <bra...@ki...>]

Brian Paul wrote:
> Brad King wrote:
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x410265b6 in clear_pixmap () from 
>> /home/kingb/Nightly/Mesa-build/lib/libMesaGL.so.1
> That helps a lot.  I think one of my assertions was invalid when using a 
> single-buffered visual.  I've replaced that assertion with a few others 
> that should expose any potentially remaining problem.

Great, I'm glad to have helped find the problem.

>> This machine was the only one on which this test failed last night so 
>> it is probably a Mesa problem.
>>
>> The second and fourth failures are probably not Mesa-related.  The 
>> third failure might be a Mesa bug but it is not a crash.  This page 
>> reports the valid (expected) image, the image the test produced, and 
>> the difference image:
>>
>> http://www.vtk.org/Testing/Sites/hythloth.kitware/Linux-gcc-3.3/20050506-0300-Nightly/Results/__Graphics_Testing_Tcl_OSCone-image.html 
> 
> Do all the tests generally run with the same GLX Visual?

Each test is a completely separate process execution, and only one runs
at a time.

>> The test was passing 2 days ago and now this machine is the only one 
>> where it fails:
>>
>> http://www.vtk.org/Testing/Dashboard/20050506-0300-Nightly/TestDetail/__Graphics_Testing_Tcl_OSCone-image.html 
>>
>>
>> so it is probably also a Mesa problem.  I can give you more 
>> information if you need it.
> 
> Let me know what happens with my latest check-in.

Okay, the crashes are gone but these two test failures:

http://www.vtk.org/Testing/Sites/hythloth.kitware/Linux-gcc-3.3/20050510-0300-Nightly/Results/__Graphics_Testing_Tcl_OSCone-image.html
http://www.vtk.org/Testing/Sites/hythloth.kitware/Linux-gcc-3.3/20050510-0300-Nightly/Results/__Parallel_Testing_Cxx_DistributedData-image.html

are definately a Mesa problem.  They started right after your big 
checkin.  I setup symlinks to trick the binaries into using the system 
GL instead of the Mesa GL and these two tests pass.  If I remove the 
symlinks they fail again.

Let me know what other information you need to find the problem.

Thanks,
-Brad