I just got myself a beautiful 27" WQHD display. It is connected to HDMI (no VideoPort) and works great showing 2560x1440 @ 60 Hz.
There is a problem however. When it goes to sleep/I turn the monitor off and then I wake it up/turn it on it doesn't come back. It stays blank eventually displaying "no signal".
The weird thing is when I switch to a different TTY, e.g. Ctrl+Alt+F2 it wakes up, but then going back to Ctrl+Alt+F7 immediately puts it back to sleep and shows "no signal" message. Currently I have to run
service lightdm restart in a different TTY in order to wake the monitor up, which is better than reboot but far from ideal. The fact that it can be woken up by switching to a different TTY or restarting
X tells me that it is a software related problem.
I am looking for any reasonable solution e.g.
- configuration tweak which will force it wake up on keypress
- a command that I could give a hot key combination which will wake up the monitor
- a driver install/update
- anything else that works
As I am running out of ideas I would appreciate any advice, thoughts, guesses. Thanxalot!
P.S. I run xubuntu 16.04 and use Intel® HD Graphics 4600