[Intel-gfx] gen6 (SNB) GPU still stalling besides latest patches
nkalkhof at web.de
Mon Jun 20 22:59:51 PDT 2011
ok, I'll give it a try this evening. Just one more thing: Should I pass enable_rc6 as a boot parameter like this: "i915.enable_rc6=0" or is it set by echoing sysfs (/sys/module/i915/parameters/...)?
Von: "Jesse Barnes" <jbarnes at virtuousgeek.org>
Gesendet: Jun 21, 2011 2:19:29 AM
An: "Ted Phelps" <phelps at gnusto.com>
Betreff: Re: [Intel-gfx] gen6 (SNB) GPU still stalling besides latest patches
>On Tue, 21 Jun 2011 10:01:35 +1000
>Ted Phelps <phelps at gnusto.com> wrote:
>> Hi Nicolas,
>> Nicolas Kalkhof writes:
>> > SNB GPU still hangs frequently with kernel patches next-20110620
>> > raising "drm:i915_hangcheck_ring_idle *ERROR* Hangcheck timer
>> > elapsed... gen6 bsd ring idle". This happens when multiple
>> > applications (mplayer decoding vaapi stream and some openGL game)
>> > running at the same time. With either one running there is no
>> > stalling. Could someone please confirm the issue?
>> > /sys/module/i915/parameters/semaphores is set to 0
>> > xf86-video-intel compiled with --enable-sna
>> I haven't tried SNA, but I've seen GPU hangs as well (SNB 2600K). I've
>> found that disabling RC6 (enable_rc6=0) seems to help. Can you see if
>> that helps?
>> [Note to self: submit a bug report]
>Please do; and please try to confirm that your GPU hangs are really rc6
>related. RC6 provides a huge (multiple Watt) power savings, and we
>really want it to be robust.
>Jesse Barnes, Intel Open Source Technology Center
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