[Bug 27816] DVI corrupted output on dual setup VGA + DVI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27816

--- Comment #11 from Alex Deucher <agd5f at yahoo.com> 2010-04-24 09:39:42 PDT ---
(In reply to comment #10)
> I spoke too soon... trying with fresh install of Lucid RC showed that sometimes
> the DVI screen will work correctly, but it's a matter of luck and most time it
> won't.

It depends what crtc was last sourced to the encoder.

> 
> I'm not trying to have three monitors, just realised that that enabling and
> then disabling the LCD fixes the issue. The LCD should be disabled when two
> external screens are attached anyway.

That's a user preference thing; different users want different things in that
case.  The real problem appears to be that the encoder on the non-active head
is not properly disabled.

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