I have the problem that every time when I lock my desktop environment and the monitor is turned off it is not activated again by moving the mouse or pressing any key. Only by switching tty (ctrl+alt+f7) the monitor is turned on again.
The problem can easily be reproduced on my pc by connecting from another device per ssh with the following commands:
export DISPLAY=:1 xset dpms force off
xset dpms force on
has no effect.
I tried the following driver version: 340.96, 361.42 (both official repository), 358.16, 364.19 (from graphics-drivers ppa)
The problem is not occurring when using nouveau and not on Windows 10.
The problem only occurs if the monitor is connect per displayport. (I need displayport for getting 4k@60hz)
I could reproduce the problem on the live version of ubuntu (only installed the nvidia driver 361).
Moreover I m using ubuntu gnome and could reproduce the problem with gdm3 and lightdm.
A probably different issue that occurs after the monitor is restored by using switching tty (ctrl+alt+f7) is that the desktop looks “corrupted”: color of the background on gnome and icons, buttons in unity are messed up (I attach two screen shots of this).
- ubuntu 16.04,
- geforce 670 gtx
- Samsung U28E590D
Thanks for reading!
nvidia-bug-report.log.gz (196 KB)