Comment 9 for bug 432670

Since installing Karmic my fan has been operating at high speed too often for my liking and now I've had a number of unexpected shutdowns whilst using Firefox or transcoding using dvd::rip, particularly when doing both . I got the following errors from the last shutdown after it hung:

Modem Manager caught signal 15, shutting down
avahi-daemon main process terminated with status 255
rsyslog-kmsg main process killed by TERM signal

I've checked for any log in /var/log but I haven't found any useful information (not sure if that's even the right place to check). Please help me resolve this as I've been experimenting with linux for a month now and was hoping not to reload windows if I liked it enough, but I can't have unexpected shutdowns everytime I do anything processor intensive.