I am having the same trouble. Linux Mint 17.1 64Bit and fully updated as of 12/22/2014.
What was linked above has temporarily fixed the issue. (Alt+F2 and run the "r" command). Works for me until we can figure out what the issue is.
Graphics Card: AMD/ATI RV516 [Radeon X1300/X1550 Series] configuration: driver=radeon
I hope this helps in some way.
I am having the same trouble. Linux Mint 17.1 64Bit and fully updated as of 12/22/2014.
What was linked above has temporarily fixed the issue. (Alt+F2 and run the "r" command). Works for me until we can figure out what the issue is.
Graphics Card: AMD/ATI RV516 [Radeon X1300/X1550 Series]
configura tion: driver=radeon
I hope this helps in some way.