[Bug 33657] Second device in a dual head system flashes on and off

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33657

--- Comment #6 from SMF <smf.linux at ntlworld.com> 2011-01-30 02:33:27 PST ---
(In reply to comment #5)
> This issue is that digital links tend to be pickier about pll dividers and
> underflow to the display controller than analog links.  You might also try
> booting with radeon.disp_priority=2 on the kernel command line in grub.  Can
> you also try the patches in comments 8 and 20 from the other bug
> (https://bugzilla.kernel.org/show_bug.cgi?id=26552)?

tried radeon.disp_priority=2 with stock kernel;
tried patch from comment 8 with and without radeon.disp_priority=2;
tried patch from comment 8 with patch from comment 20, with and without
radeon.disp_priority=2;

All failed to make any improvement the flashing is now every few seconds .With
the patch combination suggested in comment 3 of this thread the flashing went
out to 1-5 minutes between events.

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