From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 82781] Option to disable mclk reclocking with AMD R9 280X
(TAHITI) to avoid screen flickering on VGA/CRT
Date: Tue, 19 Aug 2014 16:16:30 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=82781
--- Comment #5 from Alex Deucher ---
Created attachment 147331
--> https://bugzilla.kernel.org/attachment.cgi?id=147331&action=edit
possible fix
As you can see from your log, the vblank time for the mode you've selected is
right at the mclk switching limit:
[ 5.943137] vblank_time 450, switch_limit 450
so I guess in your case, there are times when it doesn't quite complete in
time. A minor adjustment to the comparison should fix it.
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