The X-Server crashes when executing the MATLAB benchmark test "bench" a second time and when it reaches the 3D test. The problem occurs when starting the test from within a vncserver (Tightvnc-1.2.9-199) as well as at the graphical console. There's no problem, when using a remote X-Server (Hummingbird Exceed 10.0) and this problem does not occur with the 32Bit Version of the xorg-x11 used remotely on a 32Bit Linux box. MATLAB: 7.3 (R2006b) x86_64 System: ASUS K8N-DRE with 2xOpteron 275 OS: SuSE-Linux 10.1 x86_64 xorg-x11-server-6.9.0-48 Unfortunately, I'm not experienced with xorg-x11, but I can run tests or provide additional information. Here's the tail of the /var/log/Xorg.0.log from the console experiment: ============ *** If unresolved symbols were reported above, they might not *** be the reason for the server aborting. Backtrace: 0: X(xf86SigHandler+0x7e) [0x44866e] 1: /lib64/libc.so.6 [0x2aabe08b2b20] 2: /usr/X11R6/lib64/modules/extensions/libGLcore.so (_mesa_test_framebuffer_completeness+0x10a) [0x2aabe157843a] 3: /usr/X11R6/lib64/modules/extensions/libGLcore.so (_mesa_update_framebuffer+0x104) [0x2aabe157b574] 4: /usr/X11R6/lib64/modules/extensions/libGLcore.so(_mesa_update_state+0x429) [0x2aabe15b13f9] 5: /usr/X11R6/lib64/modules/extensions/libGLcore.so(_mesa_GetIntegerv+0x268) [0x2aabe157bc68] 6: /usr/X11R6/lib64/modules/extensions/libglx.so(__glXDisp_GetIntegerv+0x87) [0x2aabe13b2117] 7: X(Dispatch+0x195) [0x4880d5] 8: X(main+0x3fe) [0x49530e] 9: /lib64/libc.so.6(__libc_start_main+0xf4) [0x2aabe08a0154] 10: X [0x430cc9] Fatal server error: Caught signal 11. Server aborting
The X-Server doesn't crash if I change the MATLAB configuration in the following way: opengl('OpenGLEraseModeBug',1) The MATLAB documentation explains that this command activates a workaround for an OpenGL bug, but this is the only workaround, which is not yet explained in the documentation.
I had also issued a bug report at Novell: https://bugzilla.novell.com/show_bug.cgi?id=211314 Latest news: - It seems to be a software rendering issue - The problem is not limited to the interworking with MATLAB - The problem is not limited to 64-bit, but also occurs in 32-bit systems - The MATLAB OpenGL bug-workarounds do not really help (http://www.mathworks.com/access/helpdesk/help/techdoc/ref/opengl.html)
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
Is this still an issue with recent servers? If so, please reopen with a recent backtrace. Sorry for the delay in responding to this report.
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