nouveau: w520 dock station: link training failed

[Ricardo Ribalda Delgado]

Hi

I am trying to use a external monitor connected via display port to
the dock station of a w520. Unfortunately nothing is on the screen and
dmesg outputs:

[  520.916021] nouveau E[   PDISP][0000:01:00.0] DP:0006:0344: link
training failed


If I connect it to the DP port on the notebook it works as expected
and the dmesg outputs:
[  562.099298] nouveau E[     DRM] DDC responded, but no EDID for DP-1

I am using Linux pili 3.14-1-amd64 #1 SMP Debian 3.14.12-1
(2014-07-11) x86_64 GNU/Linux

The dock station works perfectly with the proprietary driver from nvidia

Is this a known bug? How can I provide a more detailed bug report?


Regards!

-- 
Ricardo Ribalda