[Intel-gfx] Intel Driver and 4K video output

[Lukas Hejtmanek]

On Fri, Apr 24, 2015 at 01:24:56PM +0100, Chris Wilson wrote:
> iirc xrandr automatically chooses a fb size for your based on the
> remaining outputs.
> 
> If you add --fb 3840x2160 to each of your invocations, it shouldn't
> touch the screen size. Hopefully.
> -Chris

if you meant something like this:
xrandr --output eDP1 --off --fb 3840x2160

then nope, logical screen size is shrunk to 1920x2160. 

The logical means, that maximizing windows results in a half wide windows and
the same is for xfce panel. The display is 3840x2160 as expected.

Moreover, if I unplug display port cable while eDP1 is off, I don't have any
screen and it is hard to get at least some display. I thought that this is
kind of hotplug, i.e., something happens on plug/unplung and that the result
is different of all black screen. Also, plugging display port cable back does
not restore display at least on the external monitor, so I have both of them
black only..

-- 
Lukáš Hejtmánek