Bug#659363: Hibernate freezes on HP dc7900 with Linux 3.2 (regression)

[Per Olofsson <pelle@dsv.su.se>]

Hi Jonathan,

2012-03-16 19:00, Jonathan Nieder skrev:
>> I have now tried some debugging steps, but I can't get the system to
>> freeze with the debugging modes.
> 
> Thanks for checking.  Could you spell this out a little more for me?
> 
> Do you mean, for example, that
> 
> 	echo platform >/sys/power/disk
> 	echo disk >/sys/power/state
> 
> doesn't hang?

What I mean is that I can't get it to hang when I write different values
to /sys/power/pm_test, as suggested in basic-pm-debugging.txt. It only
hangs with the default value "none".

Also, it doesn't matter if I put platform or shutdown in
/sys/power/disk. It hangs anyway.

I have noted, however, that it seems to hang much less frequently if I
unload the Virtualbox modules. But I am not certain, and it does hang
anyway after a while.

I am in contact with Bojan Smojver who made some changes in the
hibernate code for 3.2. He has given me further debugging hints, but he
thinks that my error is due to memory corruption by i915.

-- 
Pelle