[Bug 90963] i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90963

sassmann at redhat.com changed:

           What    |Removed                     |Added
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                 CC|                            |sassmann at redhat.com

--- Comment #52 from sassmann at redhat.com ---
Seeing the same issue with my Lenovo w541 and Dell u3415w. With DP 1.2 disabled
I'm now able to run the monitor at 3440x1440 with kernel 4.5-rc4. With kernel
4.4 the monitor still goes to powersave.

The weird part is that during boot up the screen still goes to powersave and
switches back to the notebooks internal display. The u3415w only turns back on
when logging into GNOME.

Checking xrandr when the system has booted shows.

eDP1 connected (normal left inverted right x axis y axis)
   1920x1080     60.00 +
DP2 disconnected (normal left inverted right x axis y axis)
DP2-1 connected primary 3440x1440+0+0 (normal left inverted right x axis y
axis) 798mm x 335mm
   3440x1440     59.97*+  49.99

I then tried to force the external screen via kernel cmdline parameters
video=eDP1:d video=DP2-1:D without success.

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