I'm trying to put an issue to bed that has caused problems for the last six months on a Dell XPS tower that I ordered with Windows 10. I installed Ubuntu 18.04 as a second OS, and disabled the purple splash screen (removed quiet splash from grub.cfg) and here's what happens.
The system boots and starts displaying startup messages. That works fine until the screen switches modes, at which point the messages freeze, the lower part of the screen fills with dashed lines, and two other lines appear about a quarter of the way down. After a minute or so, those two lines are joined by a third line between them. Nothing further happens on the screen.
Here's the weird part. If I hit the power button after the third line appears, the system takes about a minute and goes into suspend mode, with a pulsing light in the power button. I hit the power button one more time, and the computer wakes up to a perfectly normal login screen. From there on, everything works fine and I can use the system for days, no problem. There is no problem if I boot into Windows 10, the system just works normally.
I'd like to stop needing the suspend/resume cycle (which fails about 10% of the time) and have the system just boot into the correct video mode. Does anybody have any idea what's happening and how I can fix it?
