Actually, I think I know what the problem is. The 820M is one of those card with a boost feature and on Windows the driver will boost until the GPU temperature reaches 70C, then the driver will start downclocking the GPU. On Linux this feature seems to be missing, the driver never downlocks and the card will boost until either powerclamp starts injecting insane amounts of idle time or (if you have disabled powerclamp) the temperature reach the thermal limit (~96C).
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1391422 Title: GeForce 820M running very hot in Ubuntu Status in xorg package in Ubuntu: Incomplete Bug description: Ubuntu release: Ubuntu 14.10 Wine: 1:1.6.2-0ubuntu6 GPU: Intel HD 4000+Nvidia GeForce 820M Nvidia drivers: nvidia-331-updates Expected behaviour: GPU temperature should not be excessively high when running OpenGL games. What happens: The GPU temperature gets very high when running OpenGL games. For example, running "The Talos Principle Public Beta" from Steam in Ubuntu the GPU temperature will go up to 95-98C but running the same in Windows 8.1 (on the same laptop) the temperature stays below 80. The same thing happens when running other games and games in wine. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1391422/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
