Laptop is getting hot after resume from suspend

[Paul W. Frields]

On Fri, Dec 07, 2012 at 04:02:09PM +0100, Christian Menzel wrote:
> Hi,
> 
> while my Thinpad X220 normally shows 50 to 60  degrees Celsius, when
> running on normal load, it gets hot to 90 to 96 degrees Celsius after
> resume from suspend, although top does not show any CPU eating processes.
> I think I experience this behavior since switching to kernel 3.6.x.
> 
> Does this happen on other machines too? Is there a cure for it?

You're probably seeing this bug, where the GPU gets stuck in power-on
mode:

https://bugzilla.redhat.com/show_bug.cgi?id=866212

I've found that if you add 'i915.i915_enable_rc6=7' to your boot line,
it will work around the bug about 60-70% of the time.  When it
doesn't, suspending and resuming again (i.e. closing lid for a few
seconds and reopening) usually makes the workaround take hold.

-- 
Paul W. Frields                                http://paul.frields.org/
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