Old kernel version: 4.0.5-4.g56152db-desktop New kernel version: 4.0.5-1-desktop Moved to Factory repo for the kernel only. Still broken, but different. Now, instead of seeing black, I see a flashing cursor in the top left, on a black background, followed by a whole bunch of garbage, much of which is flashing. It looks like it's in a low-res text mode. About 28 characters tall. A whole bunch of similar custom characters, different colours and some of them flashing. If I hit ctrl-alt-F1, I get a different screen. Still characters, only this time just a few green ones on black. I can then ctrl-alt-F7 back to the other screen. Back and forth, I can flip between the two broken screens. So yes, there's probably a second bug here, and it's not fixed! Also I just noticed that my laptop is a T41. It says so right under the screen.