From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Subject: Re: Blanking out when driving QHD 2560x1440 cheap
 panels with the displayport
Date: Fri, 7 Mar 2014 11:03:08 +0200
Message-ID: <20140307090308.GE3852@intel.com>
References: <5318F196.7060509@starset.net>
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To: Rubin Abdi <rubin@starset.net>
Cc: Intel-gfx@lists.freedesktop.org
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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=3D70254#c40

-- =

Ville Syrj=E4l=E4
Intel OTC