[Bug 15175] radeon rs690 issues with 1920x1200 DVI (blanking)

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15175





--- Comment #21 from Alex Deucher <agd5f at yahoo.com>  2009-02-26 12:07:34 PST ---
Created an attachment (id=23331)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=23331)
possible fix

the monitor may not like the frequency that's getting picked.  let's try
tweaking it a bit.  Can you try the attached patch against ati git master? 
There are two options to try with the patch: tweaking the frequency up, and
tweaking it down.  Please try both combinations by commenting out the
appropriate line from the patch below:
clk = mode->Clock - 10;
clk = mode->Clock + 10;


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