[Bug 359392] Re: [i965] X freezes starting on April 3rd

[wirechief]

I hope that those who find they need to reboot because of the freeze have at least tried RSEIUB , if used correctly
it can prevent filesystem damage here is a link to how its used.. http://techpatterns.com/forums/about911.html
I have noticed that `intel_reg_dumper`, which is available as part of the xserver-xorg-video-intel-dbg package
reveals the register that is being changed when the freeze occurs, running it before and after  the crash and using
sudo intel_reg_dumper > reg_good.txt  before the crash and sudo intel_reg_dumper > reg_bad.txt  after the crash
from a ssh session to the sick machine and then doing sudo diff reg_good.txt reg_reg_bad.txt will show the register
that is changing .
 diff reg_good.txt reg_bad.txt
140c140
< (II):              MI_MODE: 0x00000200
---
> (II):              MI_MODE: 0x00000000
and then 
wirechief at wirechief-laptop:~$ cat reg_bad.txt |grep MI_MODE
(II):              MI_MODE: 0x00000000
wirechief at wirechief-laptop:~$ cat reg_good.txt |grep MI_MODE
(II):              MI_MODE: 0x00000200
I am reading in other bug reports this is the common indication that the freeze issue has occurred.

-- 
[i965] X freezes starting on April 3rd
https://bugs.launchpad.net/bugs/359392
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