Ubuntu

  1. Bug #1313539
  2. Comment #0

Comment 0 for bug 1313539

Revision history for this message
palomino (palominoforever) wrote : monitor shows black screen and "no input signal" after turning the monitor off and on manually

I upgraded my xubuntu 13.10 to 14.04 recently. When I turn the monitor off and on, it only shows "no input signal". I have to restart x to bring it back to work. This never happened on 13.10.
Booting from xubuntu 14.04 livecd or a clean installion of xubuntu 14.04 gives the same problem.
I tried xset dpms force off/suspend/standby, the monitor works fine after resuming. So i suppose it's not dpms to blame.
My graphics card is Intel HD4600 and my monitor is Dell UP3214Q. The monitor is connected with a displayport cable.
Enable or disable the displayport 1.2 setting of the monitor doesn't change anything.
This issue does not occurs on another computer (with nVidia gfx card+Dell U2713HM+DVI cable)

Reinstall 13.10 solved the problem.