Comment 3 for bug 1500925

Hi
Actually this topic is still undecided even through it was so important for me.
Because, this computer is my workstation and sometime I don't use it several days.
And some day I'd like to login to check somthing but the screen never came back.
Ctrl+Alt+F1 or other combination didn't response till reboot the system.
Or I'd like to get a communication via TeamViewer but this screen is same real one as black.
So last 2-3 months I was very busy to overcome problem.
Because OS reinstallation should be last solution which called plan Z.

So
Yesterday I typed following commands than the problem fixed.
     dm-tool lock
     light-locker-command
     light-locker &
     light-locker-command -l
     lxlock
     sudo reboot

After booting up, the system has been back to normal.

Thanks
Ertan