Bug 203499

Description of problem:
I've been testing out the gnash flash plugin; while browsing some sites
containing flash (esp. anandtech.com, in my case), the x-server would just
crash. Two different (but quite similar) backtrace from gdm logs are posted below.

>>>
X Window System Version 7.1.1
Release Date: 12 May 2006
X Protocol Version 11, Revision 0, Release 7.1.1
Build Operating System: Linux 2.6.9-34.ELsmp x86_64 Red Hat, Inc.
Current Operating System: Linux agape 2.6.17-1.2573.fc6 #1 SMP Fri Aug 18
13:23:39 EDT 2006 x86_64
Build Date: 18 August 2006
Build ID: xorg-x11-server 1.1.1-24.fc6 
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Aug 21 00:31:55 2006
(==) Using config file: "/etc/X11/xorg.conf"
(EE) AIGLX: Screen 0 is not DRI capable
ProcXCloseDevice to close or not ?

Backtrace:
0: /usr/bin/Xorg(xf86SigHandler+0x71) [0x495eb1]
1: /lib64/libc.so.6 [0x2aaaab399260]
2:
/usr/lib64/xorg/modules/extensions/libGLcore.so(_mesa_update_draw_buffer_bounds+0)
[0x2aaab723ede0]
3: /usr/lib64/xorg/modules/extensions/libGLcore.so [0x2aaab731734d]
4: /usr/lib64/xorg/modules/extensions/libglx.so [0x2aaaabfb1cab]
5: /usr/bin/Xorg(compPositionWindow+0x62) [0x54de32]
6: /usr/bin/Xorg(ResizeChildrenWinSize+0x17b) [0x43848b]
7: /usr/bin/Xorg(ReparentWindow+0x1df) [0x43871f]
8: /usr/bin/Xorg(ProcReparentWindow+0xbc) [0x4496bc]
9: /usr/bin/Xorg(Dispatch+0x1ca) [0x449c3a]
10: /usr/bin/Xorg(main+0x455) [0x432575]
11: /lib64/libc.so.6(__libc_start_main+0xf4) [0x2aaaab386aa4]
12: /usr/bin/Xorg [0x431869]

Fatal server error:
Caught signal 11.  Server aborting
<<<<

and this too,

>>> 
X Window System Version 7.1.1
Release Date: 12 May 2006
X Protocol Version 11, Revision 0, Release 7.1.1
Build Operating System: Linux 2.6.9-34.ELsmp x86_64 Red Hat, Inc.
Current Operating System: Linux agape 2.6.17-1.2564.fc6 #1 SMP Mon Aug 14
01:17:59 EDT 2006 x86_64
Build Date: 10 August 2006
Build ID: xorg-x11-server 1.1.1-20.fc6 
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Aug 15 08:28:30 2006
(==) Using config file: "/etc/X11/xorg.conf"
(EE) AIGLX: Screen 0 is not DRI capable
ProcXCloseDevice to close or not ?

Backtrace:
0: /usr/bin/Xorg(xf86SigHandler+0x71) [0x4a09c1]
1: /lib64/libc.so.6 [0x39b8a33260]
2:
/usr/lib64/xorg/modules/extensions/libGLcore.so(_mesa_update_draw_buffer_bounds+0)
[0x2aaab6606540]
3: /usr/lib64/xorg/modules/extensions/libGLcore.so [0x2aaab6764f3d]
4: /usr/lib64/xorg/modules/extensions/libglx.so [0x2aaaab3d5cab]
5: /usr/bin/Xorg(compPositionWindow+0x62) [0x54dd92]
6: /usr/bin/Xorg(ResizeChildrenWinSize+0x1ce) [0x4384de]
7: /usr/bin/Xorg(miMoveWindow+0x11a) [0x4dd5fa]
8: /usr/bin/Xorg(compMoveWindow+0xab) [0x54ecfb]
9: /usr/bin/Xorg(ConfigureWindow+0x776) [0x437b96]
10: /usr/bin/Xorg(ProcConfigureWindow+0x96) [0x4494b6]
11: /usr/bin/Xorg(Dispatch+0x1ca) [0x449c3a]
12: /usr/bin/Xorg(main+0x455) [0x432575]
13: /lib64/libc.so.6(__libc_start_main+0xf4) [0x39b8a20aa4]
14: /usr/bin/Xorg [0x431869]

Fatal server error:
Caught signal 11.  Server aborting
<<<<
Version-Release number of selected component (if applicable):


How reproducible: often


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: