[Bug 96868] AMDGPU Tonga only does 2560x1440 at 120hz, switching to 144hz causes display errors, same thing used to happen with fglrx.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96868

--- Comment #36 from Alex Deucher <alexdeucher at gmail.com> ---
Created attachment 142660
  --> https://bugs.freedesktop.org/attachment.cgi?id=142660&action=edit
possible fix

Does this patch help?
https://patchwork.freedesktop.org/patch/264781/
Attached is a backport to older kernels.

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