I'm trying to compile my own kernel (3.5) under Ubuntu 12.04.
What I did:
After copying over the config from the existing kernel (one from the repos) and merging the new options (using the defaults), I build a deb. I then install the deb as one usually installs a deb.
When the desktop environment loads, I discover I cannot access USB devices. A PS/2-based keyboard works fine, which I can use when I drop into a new tty or open a terminal window. X does not report any USB input devices.
Perhaps the modules didn't get compiled into the kernel before the install.
Other (questionably relevant) information:
If I boot into an older kernel, everything works beautifully.
It appears as though it does see the various USB hubs, probably located in the motherboard.
Is there a a place I can check whether or not everything I need gets loaded? Or does somebody see what my problem is right off? Logs are available upon request.