Edit: it fixed itself, but I have no idea how...
I have a new laptop running Ubuntu 11.04. If I have certain USB devices (a wireless mouse, or my camera, but not a USB flash drive) plugged in to any of the computer's USB ports, Ubuntu won't boot. (They work fine as long as I plug them in once I can see an Ubuntu splash screen.) It gets to GRUB, and if I run in recovery mode, it starts booting, then freezes at about 2 seconds, and goes to a black screen. (Without recovery mode, it just does the black screen.)
Ctrl+Alt+F1 does nothing; I also can't ssh into it at this point. Removing kernel options
quiet splash from GRUB did nothing except give a "Loading, please wait..." message with the USB not plugged in; the same for replacing them with
noapic. My BIOS has no "legacy USB" option that I can find.
Nothing I can find in /var/log is updated when this happens, so I have no logs.