[Bug 88012] [bisected BYT] complete freeze after: drm/i915/vlv: WA for Turbo and RC6 to work together

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88012

--- Comment #36 from Juergen Froehler <openelec at froehler-moreno.de> ---
(In reply to Deepak S from comment #33)
> Hi Jesse,
> 
> I am suspecing the voltage change after GPU frequencey request.
> 
> Can we try below options.
> 1. Keep the frquency at min (RPn) & run the workload. This will ensure we
> run at contant GPU voltage.
> a) cat /sys/class/drm/card0/gt_RPn_freq_mhz
> b) echo "value from above cmd" >/sys/class/drm/card0/gt_max_freq_mhz

Hi together,

did testing Option 1 - but still the System freeze and no chance to get some
relevant output in the log.

~# cat /sys/class/drm/card0/gt_RPn_freq_mhz
167
~# cat /sys/class/drm/card0/gt_max_freq_mhz
854
~# echo "167" >/sys/class/drm/card0/gt_max_freq_mhz                            
                                                                        ~# cat
/sys/class/drm/card0/gt_max_freq_mhz
167

kind regards
Juergen

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