[Bug 69790] [HSW ULT] testdisplay : The output of 720x576 mode is dislocated

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69790

--- Comment #3 from Qingshuai Tian <qingshuai.tian at intel.com> ---
(In reply to comment #2)
> I managed to reproduce this on my HSW. But it seems that it's somehow random
> as it doesn't happen every time. It's rather hard to reproduce actually when
> you just retry the same mode w/ 'testdisplay -o'.
> 
> There's no difference in dmesg between a good and bad modesets using the
> same mode.
> 
> As it stands, I don't have any good ideas as to what might be happening.
I think this issue caused by the monitor ,the same mode can work well with
other monitors on that ULT machine and I can’t find any good commit before.

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