Comment 59 for bug 636045

I upgraded to Ubuntu 10.10 only four or five days ago, and today my 10.10 would hang during startup. I tried several times, waited 15 minutes or so (startup fsck rarely shows me more than a black screen), finally had to power off. Then I chose the last 10.04 kernel, and sure Ubuntu started without problems.

The last thing kern.log shows before I powered off are "CPU power or thermal limit exceeded", at a rate of one every five seconds. Other interesting-sounding messages were
-- Buffer I/O error on device sr0, logical block 1024
-- sr 1:0:0:0: [sr0] Add. Sense: Read of scrambled sector without authentication
-- task nautilus:1923 blocked for more than 120 seconds"
-- task pactl:2048 blocked for more than 120 seconds
-- rtl819xSE:Firmware Download Fail!!a".

I am attaching my full kern.log in case anybody cares.