[Bug 97260] R9 290 low performance in Linux 4.7

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97260

--- Comment #8 from Kai <kai at dev.carbon-project.org> ---
(In reply to Alex Deucher from comment #6)
> Does reverting 5e031d9fe8b0741f11d49667dfc3ebf5454121fd (drm/radeon/pm:
> update current crtc info after setting the powerstate) help?

No, it does not for me (I fetched the patch from
<https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/?id=5e031d9fe8b0741f11d49667dfc3ebf5454121fd>
and applied it with patch -p1 -R < /path/to.patch). The Talos Principle is
still down to 43 FPS, haven't tested XCOM 2 or anything else.

Btw, not sure if it can help tracking down the cause: the GPU doesn't seem to
go into its highest performance mode or at least the fan is not reaching its
highest RPM when I'm on 4.7.0 (with or without the revert).

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