[Bug 539609] Re: i915.powersave causes hangs particularly following suspend/resume on i945 and older cards

[trouts2]

My system hangs very often and seems to be related to hibernation or power down on no use.  I leave the system and come back and it's hung.  There are a few ways it hangs i.e. when overly busy but often when doing nothing for long periods.  
A hang today with a Sysrq dump shows (I think) i915 as the pid farther with as the trace getting a 120 second timeout at __mutex_ock_slowpath.
I'm running Ubuntu 9.10 with all updates as of 4-12-2010.  This happened on 10.04 LTS also.
I have a few traces with mem and blocked from sysrq if anyone would want to look at them.

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i915.powersave causes hangs particularly following suspend/resume on i945 and older cards
https://bugs.launchpad.net/bugs/539609
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