On Tue, Dec 11, 2012 at 10:21 AM, Christian Menzel <christian.menzel@gmail.com> wrote:



On Mon, Dec 10, 2012 at 5:29 PM, Paul W. Frields <stickster@gmail.com> wrote:
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.

Hi Paul,

yes that sounds exactly like the issue I'm experiencing, thanks for the workaround, I'll try it out.

Regards
Chris

Ok, the workaround seems to work, I had to the suspend/resume cycle twice, but it's far better than before.
When editing the boot line I noticed it already contained  'i915.i915_enable_rc6=1' but 7 seems to be the perfect value.

Thanks a lot
Chris