[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 #204 from tkdestroyer2+bugs-freedesktop at gmail.com ---
(In reply to iburnth3playb00k from comment #203)
> (In reply to chris from comment #188)
> > I suffered pretty much all of the issue listed in this thread for many weeks
> > since upgrading to 3 1440p monitors.
> > 
> > I have an Club 3D R9 390 Royal Queen.
> > 
> > Comment #182 best describes the problem I faced and what I had to do to work
> > around it.
> > 
> > I am happy to announce that kernel 4.16.7 has solved this issue for me.
> > 
> > My system has no more issues booting. KDE is stable. No flickering at all.
> > Even when forcing power_dpm_force_performance_level to 'low'.
> > 
> > I'm running Gentoo with:
> > mesa-18.1.0
> > libdrm-2.4.91
> > xf86-video-amdgpu-18.0.1
> > xorg-drivers-1.19
> > 
> > kernel params include: radeon.cik_support=0 amdgpu.cik_support=1
> > amdgpu.modeset=1 amdgpu.dc=1 amdgpu.dpm=1
> > 
> > If anyone needs more info please ask.
> 
> Im kinda new to linux and i have this problem.
> Can you create a step by step guide to help me fix the problem?

You need to:

a) Upgrade the kernel to a newer version.

b) Add boot parameters

There are guides online for these. Search for one in your distribution (e.g.
Gentoo, Arch, Ubuntu).


I myself still get kernel panics on latest (4.17.12) and freezes and whatnot.
Older versions with dpm=0 are my only success.

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