I used to have a DVI attached monitor which correctly blanked and powered off from inactivity.
I recently upgraded my monitor and switch to DisplayPort. I now observe this:
- The screen blanks as expected.
- The monitor powers off for about 2 seconds.
- The monitor powers back on but stays blank with just the mouse cursor showing… it will stay like this for hours until I log back in.
I have been just turning the monitor off when I leave. Yesterday I did a full clean reinstall of Antergos and GNOME and still have the same problem.
If the hardware matters:
Monitor: BENQ 27" GW2765HT 2560x1440 WQHD Resolution.
Card: GIGABYTE GeForce GTX 970 4GB G1 card
Driver: Proprietary Nvidia drivers - nvidia 361.28-4