Exactly same problem after I resume my laptop from sleep. It happens after I upgraded my Ubuntu from 12.04 to 14.04.
But Chrome Browser window is OK.
DELL 1420 GeForce 8400M GS NVIDIA Driver Version:331.38
Exactly same problem after I resume my laptop from sleep. It happens after I upgraded my Ubuntu from 12.04 to 14.04.
But Chrome Browser window is OK.
DELL 1420
GeForce 8400M GS
NVIDIA Driver Version:331.38