Bug#576656: segfault

[Joerg Platte <jplatte@naasa.net>]

Hi,

the same(?) segfault can be reproduced by starting googleearth 
and suspending the computer. Then, after the resume the server 
crashed immediately with the following backtrace:

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x3b) [0x80d8f8b]
1: /usr/bin/X (0x8048000+0x57f65) [0x809ff65]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0xffffe40c]
3: /usr/lib/xorg/modules/drivers/radeon_drv.so 
(0xb7372000+0xb1cb9) [0xb7423cb9]
4: /usr/lib/xorg/modules/libexa.so (0xb7342000+0x86c0) 
[0xb734a6c0]
5: /usr/lib/xorg/modules/libexa.so (0xb7342000+0x8790) 
[0xb734a790]
6: /usr/bin/X (miCopyRegion+0x21b) [0x81b6e7b]
7: /usr/bin/X (miDoCopy+0x44d) [0x81b739d]
8: /usr/lib/xorg/modules/libexa.so (0xb7342000+0x7b3f) 
[0xb7349b3f]
9: /usr/bin/X (0x8048000+0xc0373) [0x8108373]
10: /usr/bin/X (0x8048000+0x35f15) [0x807df15]
11: /usr/bin/X (0x8048000+0x38087) [0x8080087]
12: /usr/bin/X (0x8048000+0x1e97a) [0x806697a]
13: /lib/i686/cmov/libc.so.6 (__libc_start_main+0xe5) 
[0xb75d4b55]
14: /usr/bin/X (0x8048000+0x1e561) [0x8066561]
Segmentation fault at address (nil)

Fatal server error:
Caught signal 11 (Segmentation fault). Server aborting

Additionally, I ran into several segfaults with immediate 
server restarts when using iceweasel. The problems started when 
I started to use kms and the new radeon driver.