Reading about the 3.12 kernels I noticed that there should now be 'dynamic' power management for laptops with an Optimus design (DIS Nvidia + IGD Intel). It is not quite clear what I should expect from the patches: drastic power down for the nautilus driver or complete switching off of the Nvidia GPU. I tried a 3.12 kernel (from Rawhide: a no debug 3.12.1-2.fc21.x86_64) but notice no effect at all. With this 3.12 kernel, mesa-9.2 and xorg-x11-drv-nouveau-1.0.9-2 the battery lasts about 1 hour 40 min. (I tried with Fed19 and Fed20 beta updated). Using 'bbswitch' (which switches off the Nvidia GPU completely) I get more than 3 hours battery live. What has changed is the output of 'vgaswitcheroo', namely: # cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :DynOff:0000:01:00.0 This seems to indicate something should happen but nothing in the logs indicates any changes to a 'deep sleep state' or a 'switching off' of the GPU. Anybody else with an Optimus tried the 3.12 kernel? And by the way how can I check the 'power state' of the DIS GPU. AV -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
