Laptop is getting hot after resume from suspend

[Christian Menzel]

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

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