From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 58121] Radeon SUMO: LVDS panel blanks when enabling external
monitor
Date: Tue, 25 Feb 2014 10:29:07 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=58121
Niels Ole Salscheider changed:
What |Removed |Added
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CC| |niels_ole@salscheider-onlin
| |e.de
--- Comment #6 from Niels Ole Salscheider ---
Created attachment 127381
--> https://bugzilla.kernel.org/attachment.cgi?id=127381&action=edit
Possible fix
I tried a current git checkout and noticed that now only DisplayPort monitors
cause the problem - VGA works fine.
After debugging the issue a bit further I noticed that the problem seems to be
caused by a shared PLL between the bridge chip and the DP monitor.
The attached patch fixes the issue for me but I am not sure if we must not
share PLLs at all or just not with the bridge chip.
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