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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91880#c135">Comment # 135</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91880">bug 91880</a>
from <span class="vcard"><a class="email" href="mailto:0xe2.0x9a.0x9b@gmail.com" title="Jan Ziak <0xe2.0x9a.0x9b@gmail.com>"> <span class="fn">Jan Ziak</span></a>
</span></b>
<pre>(In reply to Jan Ziak from <a href="show_bug.cgi?id=91880#c134">comment #134</a>)
<span class="quote">> (In reply to Chris Waters from <a href="show_bug.cgi?id=91880#c133">comment #133</a>)
> > I decided to record how my system behaves when using Linux and my 390
> > together.
> >
> > This is what I see <a href="https://www.youtube.com/watch?v=9uVIzHFlTZk">https://www.youtube.com/watch?v=9uVIzHFlTZk</a>
> >
> > This is Ubuntu MATE 16.10 with Firefox open¹, something that is not at all
> > graphically intensive. On KDE Plasma 5 it's even worse, my entire system
> > will sometimes crash. It's completely unusable and I'm stuck on Windows
> > because of this.
> >
> > ¹ I know there is a tab that says "Chrome Experiments", but it's unloaded. I
> > tried loading one to see what would happen if I tried something a bit
> > intensive, but my entire system crashed. Ended up having to restart
> > recovered my session in Firefox.
> >
> > This look the same for other 390 users?
>
> The video is similar to what I am seeing, in the video it is more severe.
>
> ----
>
> If the following commands are executable on your machine:
>
> $ ls -d /sys/class/drm/card?
> /sys/class/drm/card0 /sys/class/drm/card1
>
> $ cat /sys/class/drm/card1/device/pp_dpm_sclk
> 0: 300Mhz *
> 1: 500Mhz
> 2: 698Mhz
> 3: 858Mhz
> 4: 899Mhz
> 5: 935Mhz
> 6: 969Mhz
> 7: 1000Mhz
>
> then (question) does the flickering go away if you run:
>
> $ echo 1234567 > /sys/class/drm/card1/device/pp_dpm_sclk</span >
Correction:
$ echo manual > sys/class/drm/card1/device/power_dpm_force_performance_level
$ echo 1234567 > /sys/class/drm/card1/device/pp_dpm_sclk</pre>
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