Freya hangs (loop) when locking screen automatically

[Martin Mochetti]

Change the locking time to 5 minutes of inactivity so that it locks faster.
Wait 5 minutes and the screen starts flashing. The laptop became unresponsive so I had to reboot.

Laptop:

Samsung series 9 (model NP900X4D) - Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz - 4gb RAM

Please check this video to see behavior: https://vine.co/v/euHB0a66XjU

[Martin Mochetti (martin-mochetti)]

BTW, I had a dual monitor configuration placed on top of the laptops built-in. But anyways, this happens without this configuraiton as well.

[Cactus Jack (steved2323)]

I am having the same issue... I'm running a Dell Optiplex 7020 with dual displays, when the machine is locked and I come back to my workstation, everything is flashing and frozen. The only way to fix it, is to hold the power button. Any fix for this?