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#1 2013-04-06 23:58:37

nLinked
Member
Registered: 2013-04-06
Posts: 38

[SOLVED] "Timed out waiting for forcewake old ack to clear"

If I do a dmesg, I get line after line of "[drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear". Literally there are loads of them!

If I go into TTY2 using Ctrl Alt F2, they continuously appear there too and keep generating every few seconds - the same error.

What could it be?

Last edited by nLinked (2013-08-10 21:47:32)

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#2 2013-06-22 17:15:59

groeck
Member
Registered: 2013-06-22
Posts: 1

Re: [SOLVED] "Timed out waiting for forcewake old ack to clear"

I had the same problem. Reverting commit 36ec8f8774 (drm/i915: unconditionally use mt forcewake on hsw/ivb) solved the problem for me. This is for IvyBridge CPUs only.

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#3 2013-06-22 18:40:47

nLinked
Member
Registered: 2013-04-06
Posts: 38

Re: [SOLVED] "Timed out waiting for forcewake old ack to clear"

Thanks, groeck. Mine is also Ivy Bridge. Would you know how I can "revert the commit" too please?

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#4 2013-07-27 16:54:32

nLinked
Member
Registered: 2013-04-06
Posts: 38

Re: [SOLVED] "Timed out waiting for forcewake old ack to clear"

I would like to apply this patch but I'm not sure how to.

https://git.kernel.org/cgit/linux/kerne … 3526521777

Can anyone help please?

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#5 2013-08-10 21:47:21

nLinked
Member
Registered: 2013-04-06
Posts: 38

Re: [SOLVED] "Timed out waiting for forcewake old ack to clear"

Problem solved after today's kernal update.

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