Ubuntu
xorg package

  1. Bug #1686189
  2. Comment #8

Comment 8 for bug 1686189

Revision history for this message
Tharrrk (tharrrk) wrote : Re: External monitor connecting problem

Confirming the same issue - 4.4.0-72 works on Dell E7470 with intel, 4.4.0-77 doesn't.
Seems like a kernel bug.
xrandr showing screens but displays fall into sleep whatever I try.
plymouth not affected, only X.