Comment 100 for bug 563156

Same here, Dell Studio XPS 16, HD Radeon 5670: Under 11.10 open source driver works very well except for extremely high temperature and constant, unbearable fan noise. I used the proprietary driver for six months with 11.04, with a lot of problems and tried to use it again this time around, but trying to get Catalyst working with an external monitor broke Unity thoroughly and I was forced to reinstall the entire thing.