Messages in this thread | | | Date | Tue, 11 Jan 2011 11:45:05 -0800 | From | Jesse Barnes <> | Subject | Re: [git pull] drm for rc1 |
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On Tue, 11 Jan 2011 11:25:39 -0800 Linus Torvalds <torvalds@linux-foundation.org> wrote:
> On Tue, Jan 11, 2011 at 11:12 AM, Jesse Barnes <jbarnes@virtuousgeek.org> wrote: > > > > Have you tried reproducing it using xset dpms force off or similar? > > That doesn't seem to do anything bad. > > In fact, I think the second time it happened the screen never went > black - just the random photo thing was on. But no, forcing the screen > saver on doesn't do it either (ie pressing the "lock screen" icon and > waiting for a few pictures to cycle). > > Maybe the screen just has to be inactive for a longer time: do you do > some dynamic "let's power things down if nothing is changing"?
There are some timeouts, the FBC engine will recompress about once every 15s; the self-refresh timers are much smaller though so it should be active anytime the CPU enters a deep sleep state. The clock frequency changes in millisecond time too, you can check the status of that in /sys/kernel/debug/dri/0/i915_drpc_status and i915_cur_delayinfo.
I wonder if re-enabling rc6 may have caused your issues? That would be:
commit 29a15061ff5df5bf9bf49c05c17f41eb2807a55a Author: Jesse Barnes <jbarnes@virtuousgeek.org> Date: Wed Jan 5 12:01:24 2011 -0800
drm/i915: re-enable rc6 support for Ironlake+
-- Jesse Barnes, Intel Open Source Technology Center
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