[Bug 100440] [GLK] [IGT] testdisplay -a shows corruption on HDMI 4k display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100440

--- Comment #18 from Luis Botello <luis.botello.ortega at intel.com> ---
(In reply to Ander Conselvan de Oliveira from comment #17)
> (In reply to Luis Botello from comment #16)
> > Issue is not seen anymore with that patch series. But display is showing no
> > image while running ./testdisplay -a and it goes into the following
> > resolution:
> > 
> > CRTC(36):[7]  2560x1440 60 2560 2608 2640 2720 1440 1443 1448 1481 0x9 0x40
> > 241500
> > 
> > Is there some way to force it or to set a higher timeout between each
> > resolution?
> 
> $ ./testdisplay -h
> usage: ./testdisplay [-hiasdpmtf]
> ...
> 	-s	<duration>	sleep between each mode test

After testing testdisplay on HDMI I am getting "No Signal" on HDMI screen while
test sets CRTC(36):[7]  2560x1440 60 2560 2608 2640 2720 1440 1443 1448 1481
0x9 0x40.

Also as additional info I am getting extra low performance while 3840x2160
resolution is set on HDMI, and no signal if 2560x1440 resolution is set in UI.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170425/2542f76f/attachment-0001.html>