kernel update hosed my system

[John Scott]

Weird to still have this classic problem. Have a fresh install of Ubuntu 
12.10. I let the first series of updates run but unchecked the kernel 
updates because I just had this same problem on another computer. After 
everything else was running great I went ahead and allowed the kernel 
update to 3.5.0-25-generic. Upon reboot Unity has malfunctioned and my 
display adapter is really slow. I'm in the GUI and can run programs if I 
can find the icons or start them from terminal. I'm writing this with 
Thunderbird launched from terminal.

Obviously the kernel update either didn't update modules or the ATI 
Radeon module is stale or something. Anyone seen this before? Probably 
an easy fix. I'm just surprised that a kernel update on a fresh install 
can totally hose the system with a distro this mature.

John Scott