[Bug 110674] Crashes / Resets From AMDGPU / Radeon VII

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110674

--- Comment #68 from Tom B <tom at r.je> ---
Apologies for the multiple replies/emails. I think I must just have got lucky.
It worked several boots (in a row) and now only works very occasionally. I
think it was just coincidence that it worked a few times after I installed that
kernel, sorry guys.

During my tests with 5.2.7 I have noticed some interesting findings with the
wattage though. It will indeed get stuck on a specific wattage, I've had 33,
24, 45, 133, 134 and on several wattages there is some fluctuation.  e.g.
33-34.

Higher wattages are significantly more stable, 133w lasts quite a while before
it crashes, 33w crashes instantly. I'm assuming this is because the card just
doesn't have enough power to do what's required.

When the wattage gets stuck, if you force the performance mode:

# echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level

it confuses the driver and sensors then shows

ERROR: Can't get value of subfeature power1_average: I/O error

Despite working until manually setting the power state. There doesn't seem to
be a way to get it back to a state where sensors shows the wattage after it
reaches this state, other than rebooting.


The inconsistent nature of this bug and the fact that it sometimes doesn't
appear suggests a race condition. I'd assume something else on the system
happens before or after amdgpu is expecting.

Is there any way to delay loading the amdgpu driver and manually loading it
after everything else?

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