Comment 32 for bug 1432171

I ran into this bug after a successfully logged in, could be a few hours or days latter without restarting, but suddenly session stop and I can see the black screen with "starting version 219" after that login screen appears again and I can start a new session but opened programs in the previous session still are running and I need to reboot to do a clean close of the applications left open in the former session.
I'm using Ubuntu Gnome 15.04 updated to the last software update message. Is there a way to solve this?. As additional info I could said that I boot from disk drive, without a proper UEFI boot because does not work(grub error) when I install it. At the beginning I need to select the drive boot but after a while I load without that step, maybe I select it as default but I don't remember.