Comment 2 for bug 989655

I'm starting to think it might have something to do with the nouveau graphics driver.

I eventually downloaded the alternate installation ISO and was able to finally, after two attempts, install Ubuntu. (I've never had this much trouble with a release, since 2007.)

Anyways, at the lightdm login screen, after booting into my new installation, everything was running extremely slowly. Even the mouse pointer was staggering a bit as I was trying to login. I didn't login though, I decided it would be a pain, performance-wise, so I went to a virtual terminal and did some package upgrading/installing. Among other things, I installed nvidia-current and nvidia-current-updates (of which I am using the latter), and now things run smoothly. Could it have to do with nouveau?