[Bug 91880] Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91880

--- Comment #178 from Andrea Zanoni <petercottero at gmail.com> ---
I have the same issues with an MSI R9 390 running on a MSI Z170A GAMING M5
motherboard.

The only way I can even use the card, avoiding constant black screens and os
lockup, is to use the DPM Query service
(https://github.com/illwieckz/dpm-query/) and force the dpm level on "high" and
the state profile on "performance". 

If I try to revert to the "low" level, I get this: 

ERROR: card0/power_dpm_force_performance_level does not accept "low"

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