Same here on Dell Studio 1555 notebook running Ubuntu Maverick x64 with kernel 2.6.35-22 generic. ATI Mobility Radeon HD 4570. GPU temperature is around 50 with proprietary drivers and 70 with open source drivers. My battery life is also taking a massive hit, with the usual 6 hours down to ~3.5 hours. Don't want to give up the open source driver as the overall performance is better except for this issue.
Same here on Dell Studio 1555 notebook running Ubuntu Maverick x64 with kernel 2.6.35-22 generic. ATI Mobility Radeon HD 4570. GPU temperature is around 50 with proprietary drivers and 70 with open source drivers. My battery life is also taking a massive hit, with the usual 6 hours down to ~3.5 hours. Don't want to give up the open source driver as the overall performance is better except for this issue.