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

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

--- Comment #90 from Jonas jojonintendo@tutanota.com --- comment #32 is really all you need right now. I tried it in Arch Linux and it also works like a charm. Just follow instructions on comment #77 for the "k" firmware and you're good to go. You shouldn't need to change anything in "/sys/class/drm/card0/device/power_dpm_force_performance_level", since this was to avoid the problem. Now the default behaviour (the automated dpm one) works with latest firmware.

I hope you can get it to work too :).