Package: libgl1-mesa-glx Version: 6.4.2-1.1 Severity: normal Calling gl-functions from a thread other than the program's main thread causes reproducible segfaults.
Example backtrace: --------------------------------------------------------------------- #0 0xa79cdbef in _mesa_LoadIdentity () from /usr/lib/dri/r200_dri.so #1 0xa7f5ac64 in glLoadIdentity () from /usr/lib/libGL.so.1 #2 0x0804ac85 in thread_loop () at GlxSyncTest.cpp:554 #3 0xa7eaa260 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0 #4 0xa7d2529e in clone () from /lib/tls/i686/cmov/libc.so.6 --------------------------------------------------------------------- I've observed the very same behaviour on a Radeon (r200) and a Matrox (mga) machine. A small example program code could be provided if it was of help. However, upgrading to the head of the mesa_6_4_branch in mesa cvs fixes the bug for me. I presume the relevant commits are the following: --------------------------------------------------------------------- Wed Mar 15 20:46:09 2006 UTC (5 months, 1 week ago) by brianp Branch: mesa_6_4_branch remove invalid assertion in _glapi_get_dispatch(), fixes additional thread safety problem --------------------------------------------------------------------- Wed Mar 15 20:32:48 2006 UTC (5 months, 1 week ago) by brianp Branch: mesa_6_4_branch thread safety fix from trunk --------------------------------------------------------------------- How about incorporating the changes from the mesa_6_4_branch into the debian package? There shouldn't be too disruptive changes in this bugfix-only branch. -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (990, 'testing'), (500, 'unstable') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.16preempt Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Versions of packages libgl1-mesa-glx depends on: ii libc6 2.3.6-15 GNU C Library: Shared libraries ii libdrm2 2.0.1-1 Userspace interface to kernel DRM ii libx11-6 2:1.0.0-8 X11 client-side library ii libxext6 1:1.0.0-4 X11 miscellaneous extension librar ii libxxf86vm1 1:1.0.0-4 X11 XFree86 video mode extension l libgl1-mesa-glx recommends no packages. -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
