[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 #105 from Jan Ziak <0xe2.0x9a.0x9b at gmail.com> ---
(In reply to Ernst Sjöstrand from comment #104)
> https://patchwork.freedesktop.org/series/8116/

GPU: R9 390
GPU manufacturer: Gigabyte
Kernel: 4.5.5
Kernel module: radeon.ko

I applied the kernel patches and let Metro Last Light benchmark run for about
an hour with DPM enabled while I went shopping.

Before the patch: The benchmark would lock the GPU after a while

After the patch: Running OK for about an hour

I checked that 'new_smc' variable in radeon/cik.c gets set to 1.

----

Remaining issues on R9 390 after the patch:

Heavy screen flickering, not capturable on a screenshot. It is related to mclk
transitions. Forcing mclk=1.5GHz, and letting sclk be controlled by DPM,
removes the flickering.

I created a new bugzilla entry related to the flickering:
http://bugs.freedesktop.org/show_bug.cgi?id=96326

----

GPU lockup in http://bugs.freedesktop.org/show_bug.cgi?id=92302 might have the
same cause as this issue.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20160602/ccbd67a9/attachment.html>