Comment 28 for bug 737891

Okay, I'm *finally* back home and was able to test this...

I can confirm part of what Thierry suggested. I removed ~/.config/monitors.xml and that got rid of the Samsung flashing monitor on reboot.

It comes up in cloned monitor mode, dropping down to the lowest common resolution, which is 1280x800. I am now working on my 24" monitor at 1280x800, which is better than the unusable flashing screen.

Okay, so now I try to change the resolution of my Samsung monitor to its max. I disabled the laptop screen entirely, and then I set the external Samsung to 1920x1080, and boom, flashing green/black screen all over again :-(

Give it 30 seconds, and it restores.

Next, I tried enabling both screens, with my laptop at 1280x800 and my external monitor at 1920x1080. Surprisingly, this worked just fine. Unfortunately, this isn't my preferred working setup :-( I prefer to put my laptop in my docking station, lid closed, and go straight from a single screen with 1280x800 resolution, to a single external monitor with 1920x1080.

Note that all of this works fine in 10.10. And also note that all of my testing is in the Gnome Classic Desktop.