I have the random issue where I boot up my computer, and I get hit with the motherboard splash screen. I cannot do anything from that point on, not even kernel shortcuts for shutting it down work. I have to manually shutdown the power supply and reboot the hard way for it to work. That points out the other fact that it only happens on occasion, maybe on every other boot up. I have a good feeling it has to do with the graphics driver but I can’t be sure. Here’s an example (the green bar is the same every time):
I’m using the proprietary nvidia drivers also.