I have a Pavillion DM4.
I recently upgraded to Oneiric. This is when the problem began.
When I boot, if I select the normal kernal (126.96.36.199), I get the Ubuntu image with the loading dots, but then I get a black screen, not the login screen. I cannot CTRL-ALT-F1 to the prompt.
However, I can boot correctly by booting that kernel in recovery mode, giving the boot messages, and then selecting the "Resume" recovery option, which correctly loads the login manager.
Another issue is that when my laptop hibernates/suspends (I'm not sure which), and I reactivate it, I am stuck with a black screen.
How do I resolve this?