Ubuntu
xserver-xorg-video-intel package

  1. Bug #1263681
  2. Comment #25

Comment 25 for bug 1263681

Revision history for this message
Marius Gedminas (mgedmin) wrote :

Chris Wilson said this on IRC:

"The issue is that after the hotplug interrupt is sent by the hardware, the monitor is not yet ready to respond to the DDC probes and generates a NAK instead - this leads us to conclude that there is nothing on the other end of the connector"

so it looks like a genuine upstream bug in the Intel graphics kernel driver.