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List:       mesa3d-dev
Subject:    [Mesa3d-dev] [Bug 13398] New: X crashes when logging out of second
From:       bugzilla-daemon () freedesktop ! org
Date:       2007-11-26 15:10:11
Message-ID: bug-13398-598 () http ! bugs ! freedesktop ! org/
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http://bugs.freedesktop.org/show_bug.cgi?id=13398

           Summary: X crashes when logging out of second display with
                    composite
           Product: Mesa
           Version: 6.5
          Platform: x86 (IA32)
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: GLX
        AssignedTo: mesa3d-dev@lists.sourceforge.net
        ReportedBy: amverweij@gmail.com


When the composite extension is enabled, X crashes when logging out of a second
display. The problem is also described here:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/119635. There seems to be
some similar bugs in xorg bugzilla, but at present none of these mentions the
freeze is when logging out, hence the new bug.

The backtrace of the crash is the following:
Program terminated with signal 6, Aborted.
#0  0xb7f48410 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7f48410 in ?? ()
#1  0xbfb0a3d8 in ?? ()
#2  0x00000006 in ?? ()
#3  0x00002f67 in ?? ()
#4  0xb7ccb101 in *__GI_raise (sig=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:64
#5  0xb7ccc988 in *__GI_abort () at abort.c:88
#6  0xb7d01d5b in __libc_message (do_abort=2, fmt=0xb7db69c8 <Address
0xb7db69c8 out of bounds>) at ../sysdeps/unix/sysv/linux/libc_fatal.c:170
#7  0xb7d07aa0 in malloc_printerr (action=2, str=0xb7db6ac0 <Address 0xb7db6ac0
out of bounds>, ptr=<value optimized out>) at malloc.c:5887
#8  0xb7d09799 in *__GI___libc_free (mem=0x8254c90) at malloc.c:3622
#9  0xaf89f83b in _mesa_free (ptr=0x8254c90) at imports.c:116
#10 0xaf986a71 in XMesaDestroyVisual (v=0x8254c90) at xm_api.c:1486
#11 0xaf986697 in __glXMesaScreenDestroy (screen=0x820dab0) at xf86glx.c:286
#12 0xb7bfe43a in glxSuspendClients () at glxext.c:415
#13 0xb7bfd693 in __glXDispSwap_QueryServerString (cl=0x8256560, pc=0xbfb0a810
"04 1116038    /lib/ld-2.6.1.so\nb7f64000-b7f65000 rw-p 0001a000 fd:04 1116038 
  /lib/ld-2.6.1.so\nbfaf8000-bfb0e000 rw-p bfaf8000 00:00 0          [stack]\n 
 /lib/libpthread-2.6.1.so\nb7f1d000-b7f1e000 "...) at glxcmdsswap.c:421
#14 0x0809979a in CloseDownExtensions () at extension.c:293
#15 0x08076914 in main (argc=2, argv=0xbfb0ad34, envp=Cannot access memory at
address 0x2f6f
) at main.c:451
(gdb)


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