White screen when pc locks
I have recently switched to ubuntu 12.04, I used to be a windows user and my teacher convinced me to use ubuntu. I love it! Only two problems.
I have a Dell xps 15z and when I lock the computer using ctrl+alt+L I get a white screen and I can't do anything else then give it a hard reboot.
Same thing happens in suspend (close the lit or choose suspend from the menu) only then the screen turns black instead of white.
Is this a known issue? Please help.
With kind regards,