[Intel-gfx] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy

[Daniel Vetter]

On Sat, May 26, 2012 at 11:05 AM, Oleksij Rempel (fishor)
<bug-track at fisher-privat.net> wrote:
> Hallo devs,
>
> i get this errors:
> [    9.267502] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy:
> GEN6_RP_INTERRUPT_LIMITS expected 18000000, was 12060000
> [   28.168979] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy:
> GEN6_RP_INTERRUPT_LIMITS expected 00070000, was 18000000
> [   33.685072] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy:
> GEN6_RP_INTERRUPT_LIMITS expected 18000000, was 12060000
> [  302.378301] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy:
> GEN6_RP_INTERRUPT_LIMITS expected 18070000, was 18000000
> [  662.072034] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy:
> GEN6_RP_INTERRUPT_LIMITS expected 18070000, was 18000000
> [  722.069224] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy:
> GEN6_RP_INTERRUPT_LIMITS expected 18070000, was 18000000
>
> should i fear some thing, or it is ok?

We've newly added this check, but these are the symptoms of the gpu
turbo hw getting confused and eventually leading to the gpu being
stuck at the lowest frequency. So nothing really to worry about (safe
when you've noticed gpu workload slowness which can be fixed by a
suspend/resume cycle, because this is the harbinger of it).

A patch to ducttape around this problem some more and another one to
again shut up the obnoxious dmesg noise are on track for 3.5-rc1.

Yours,
Daniel
-- 
Daniel Vetter
daniel.vetter at ffwll.ch - +41 (0) 79 364 57 48 - http://blog.ffwll.ch