[Intel-gfx] Blanking out when driving QHD 2560x1440 cheap panels with the displayport

[Ville Syrjälä]

On Thu, Mar 06, 2014 at 02:07:18PM -0800, Rubin Abdi wrote:
> Originally posted this to the Linux on Thinkpad list. A friend
> recommended I try here instead.
> 
> I have an X220, I am running Debian Sid, 3.12.9. I've used this machine
> to drive 27" and larger Dell displays at full resolution via displayport
> to displayport and displayport to dual link DVI without issue.
> 
> A few months ago I purchased one of those $400 Apple knock off S-IPS
> displays from Korea through ebay, branded as Crossover at QHD 2560x1440.
> I spent the following month trying to figure out why when driving the
> display through my machine's displayport, it would blank out after about
> a minute or two of constant action on the screen (like playing a video).
> It would go into blank/sleep mode for a second or two, bounce back, do
> this a few times before the display giving up and stating there is
> nothing turn on/plugged into the displayport and shut off. I tried 3
> different displayport cables and assumed the issue wasn't my laptop
> since I was driving a different 30" display at the office over
> displayport just fine.

Sounds like this might help:
https://bugs.freedesktop.org/show_bug.cgi?id=70254#c40

-- 
Ville Syrjälä
Intel OTC