[Bug 72750] [BYT]Flicker screen shows on VGA output while testing testdisplay -f 38.25,800,832,912,1024,600,603,607,624

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72750

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #6 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #5)
> Is the 800x600 mode the only one that flickers like this?
> 
> I presume it works well on other machines, but with the same monitor (just
> to rule out an issue with the screen)?
> 
> Video looks like pipe underruns or some other clock instability.

Yes, Only 800x600 mode has this issue, it works well on 1024x768 mode.

We doesn't find this issue on other machines(HSW BDW)

This issue occurs on HDMI output too, plese refer to
https://bugs.freedesktop.org/show_bug.cgi?id=72751

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