kernel-packages team mailing list archive

[Jean-Christophe Baptiste <jc@xxxxxxxxxxx>]

I tested with 3.14, and same problem.

But I caught some kernel messages every time I replug the screen:

[   42.038474] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
[   57.587925] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up
[   57.600327] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up
[   57.612303] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up
[   66.380412] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up
[   66.391831] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up
[   66.403830] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up

I am not sure if it relevant, but it seems so.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1300914

Title:
  External screen undetected after first plug

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  On Ubuntu 14.04, the external screen plugged on VGA is detected and get activated correctly.
  However, if I unplug it and then replug it later, it is not detected anymore and the screen receives no signal.

  A way to get it back to work is to reboot or simply suspend the
  computer.

  Sorry but I have no idea of what package is handling that.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1300914/+subscriptions