[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

--- Comment #50 from Ander Conselvan de Oliveira <conselvan2 at gmail.com> ---
(In reply to Steve Harms from comment #47)
> I can confirm this issue using all kernels 3.16 and newer, with a Lenovo
> W541 and Docking station over DisplayPort.
> 
> This issue still occurs even if I manually set my monitor to DP 1.1 (HP
> 34C).  
> Using kernel 3.13 solves this.

Kernel 3.16 didn't have MST support, so that would seem unrelated.

(In reply to Steve Harms from comment #48)
> I confirmed with the Dell XPS 13 9333 and the Lenovo W541 using a Mini-DP ->
> DP adapter that this display does work using 3440x1440 at 60hz with
> xorg-video-intel.
> 
> The issue appears to be isolated to DisplayPort docking stations (when I
> dock my Lenovo W541 this issue arises - the display can be driven at
> 2560x1440 however)

Please open a new bug report and attach dmesg all the way from boot with
drm.debug=14 in the kernel command line.

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