This happens on my Dell D630 quite often since installing 10.10 after going to standby with DVI or VGA connected (with or without docking station) and then waking up without DVI/VGA connected.
This bug seems to be a duplicate of #651133, #631872, #640666, #648535
This happens on my Dell D630 quite often since installing 10.10 after going to standby with DVI or VGA connected (with or without docking station) and then waking up without DVI/VGA connected.
This bug seems to be a duplicate of #651133, #631872, #640666, #648535