Comment 9 for bug 921714

This problem began for me with 11.04. I just upgraded (which I didn't want to do) to 11.10, hoping the problem would be fixed.

There was no overheating problem with 10.04 LTS. I tried to roll back and reinstalled 10.04, but then I remembered the Network Manager problems and the problems with trying to get the Macbook third speaker to work in that version. 11.04/10 are much better despite the overheating. I have been using Ubuntu since about ver. 8 and the only time I had problems with overheating was when I was leaving Boinc running in the background at 100%. Anyway, Ubuntu versions have improved for Macbooks with every new release, so I would like to get this problem fixed before 12.04 LTS final, but I guess I am now using the latest Precise kernel because I installed the wrong upstream kernel.

My partial fix now has been to limit Dropbox using cpulimit. Unfortunately, plugin-container (for flash and html5 video) does not work well running under cpulimit. I would like to limit file copies using cpulimit, but I don't know how. I am hoping I can figure out how to cpulimit dejavu for backups.

Regardless, the Macbook is uncomfortably hot even when running at 50% of both CPUs. Macbooks have a problem with the batteries puffing up and interfering with the trackpad, I guess when the batteries get hot. My battery is now not only puffed, but the casing has completely split apart and now falls out of the enclosure when I pick up the Macbook! I would like to get this problem resolved before investing in a new battery.