On 29 November 2012 02:57, Ben Widawsky <ben at bwidawsk.net> wrote: > On Wed, 28 Nov 2012 11:13:14 +0800 > Daniel J Blueman <daniel at quora.org> wrote: > >> Hi Daniel/Ben, >> >> On stock 3.7-rc7, when resuming my Ivy Bridge laptop from suspend, the >> kernel logs: >> >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake to ack request. >> [drm:__gen6_gt_wait_for_thread_c0] *ERROR* GT thread status wait timed out >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake to ack request. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake old ack to clear. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake to ack request. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake to ack request. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake to ack request. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake old ack to clear. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake to ack request. >> [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for >> forcewake old ack to clear. >> >> I'm running xserver-xord-video-intel 2.20.9 and xorg-server 1.13.0. >> >> Interested in any debug output? > Is this a regression? The first one is sort of expected, but the rest > are no good. > > Timing printk and lspci info would be a good start. This doesn't occur in 3.6, but does occur in 3.7-rc4+, so has regressed. I've been having a hard time bisecting due to another kernel-hang issue fixed in 3.7-rc4, so can backport the fixes I need to bisect or scope the bisection. I've put a full 3.7-rc7 boot log and suspend-resume cycle at: http://quora.org/2012/i915-suspend-forcewake.txt Last boot and suspend-resume cycle, I saw only one forcewake message; here I see a number of ones and related. Thanks, Daniel -- Daniel J Blueman
