4500MHD driver crash

[Thomas Fjellstrom <tfjellstrom@shaw.ca>]

I've been having this little problem with the intel-gfx driver for a couple
months at least. Basically the xorg intel driver crashes with these errors:

(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory
(WW) intel(0): i830_uxa_prepare_access: gtt bo map failed: Cannot allocate memory

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x28) [0x466808]
1: /usr/bin/X (0x400000+0x67c79) [0x467c79]
2: /lib/libpthread.so.0 (0x7ff19b297000+0xef60) [0x7ff19b2a5f60]
3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff197986000+0x34684) [0x7ff1979ba684]
4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff197986000+0x3524a) [0x7ff1979bb24a]
5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff197986000+0x3547a) [0x7ff1979bb47a]
6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff197986000+0x36a1b) [0x7ff1979bca1b]
7: /usr/bin/X (0x400000+0xd4750) [0x4d4750]
8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff197986000+0x319a2) [0x7ff1979b79a2]
9: /usr/bin/X (0x400000+0xd4a7e) [0x4d4a7e]
10: /usr/bin/X (0x400000+0xca92e) [0x4ca92e]
11: /usr/bin/X (0x400000+0x4c7a4) [0x44c7a4]
12: /usr/bin/X (0x400000+0x25b4a) [0x425b4a]
13: /lib/libc.so.6 (__libc_start_main+0xfd) [0x7ff199d9bc4d]
14: /usr/bin/X (0x400000+0x256f9) [0x4256f9]
Segmentation fault at address 0x29

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


After a little google, I've found the following, seemingly similar issues:

http://www.pubbs.net/201001/mandriva/43247-cooker-x-crashing.html
http://lists.opensuse.org/opensuse-bugs/2010-04/msg01805.html

This crash happens every few days, most of the time when I'm not even using
the laptop, and the lid is closed, but today it happened while I was
working. Was somewhat interesting to see things just disappear.

I've been trying to track this issue down for a while, someone said it
might be an app leaking pixmaps, but I haven't seen xrestop show more than
80MB of pixmaps for quite a while. Also, it usually occurs some time after
graphics start getting really slow (though this last time I didn't really
notice things getting slow). Talking a second or two for window or
desktop switching. At no time was there any errors or warnings in dmesg
related to this, nor was I running out of memory according to "free" or
the plasma system load viewer applet. Usually I had 1-2GB of ram available
(not including cache).

Thanks.

-- 
Thomas Fjellstrom
tfjellstrom@shaw.ca