kernel-packages team mailing list archive

[Andre Lacroix <sabine.kuehn@xxxxxxxxxxxxx>]

Hallo,

i have the same problem under Xubuntu 14.04 and a brandnew HP Zbook 14.

At system boot my external vga screen was detected correctly and a few
seconds after Xubuntu-XFCE-Login the external screen isn't available. At
a few seconds i have seen the correct XFCE-desktop through the login
process.

Here is my syslog-entry if i plug out an plug in the external vga-monitor: 
[drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up

The problem affects obviosly to a programming bug. See here:
https://bugs.freedesktop.org/attachment.cgi?id=93781 (Patch Intel i915).

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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.

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