[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 #196 from Sandeep <sandy.8925 at gmail.com> ---
Ah, I didn't know that. I thought it just disabled/enabled dpm.......well,
it works so that's good.

It would be great if it worked out of the box though, without having to add
kernel parameters.....

On Fri, May 11, 2018, 14:39 <bugzilla-daemon at freedesktop.org> wrote:

> *Comment # 195 <https://bugs.freedesktop.org/show_bug.cgi?id=91880#c195>
> on bug 91880 <https://bugs.freedesktop.org/show_bug.cgi?id=91880> from Alex
> Deucher <alexdeucher at gmail.com> *
>
> (In reply to Sandeep from comment #194 <https://bugs.freedesktop.org/show_bug.cgi?id=91880#c194>)> So, I had never used amdgpu.dc=1 and amdgpu.dpm=1 kernel parameters when
> > testing earlier.
> >
> > I tried using them now, with the 4.16.7 kernel, and replayed the APItrace
> > file. No crashes! Finally.
> >
> > Well, this is still a workaround, but atleast it works. I doubt it has
> > anything to do with DC, although it's possible......
>
> setting dpm=1 uses the new powerplay code rather than the old dpm code for
> power management on CI parts.
>
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