[Bug 206231] R9 280X low performance with all games

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=206231

--- Comment #22 from Sylvain BERTRAND (sylvain.bertrand at gmail.com) ---
On Tue, Jan 21, 2020 at 08:01:49AM +0000, bugzilla-daemon at bugzilla.kernel.org
wrote:
> Yesterday, I compiled and installed the 5.4.13 kernel, but got no
> improvements.

Only the AMD/mesa devs can reasonably deal with the insane complexity of the GL
stack (linux(drm) + libdrm + llvm + mesa(GL) + xserver + xf86-video-amdgpu).

But they won't be able to do anything if you don't run the latest git version
of the code (linux + mesa) and provide an easily reproducible and free (as in
free beer) case (or some AMD/mesa devs own your games).
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I run such a 64bits system. If you can reproduce the issue with a free (as in
free beer) game, I'll be pleased to test it to see if it happens on my system.

or

You would need to compile and run the following linux kernel:
"git://people.freedesktop.org/~agd5f/linux branch", "amd-staging-drm-next"
branch

Unfortunately, Southern Islands hardware shader compiler is llvm, you would
need to compile the latest git llvm-project (a massive pain).

Idem for libdrm, mesa, the xserver, and the amdgpu xserver driver.
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