Luis Silva, having a look at http://www.x.org/wiki/RadeonFeature/#index3h2 it would appear that upstream has intentionally not chosen "Auto" as the default power_profile due to the information provided within the section: >"Power management is supported on all asics (r1xx-evergreen) that include the >appropriate power state tables in the vbios; not all boards do (especially >older desktop cards). "dpm" is only supported on R6xx and newer asics."
Ubuntu wouldn't deviate from this upstream policy for a few reasons: 1) It could cause adverse effects on default installs for folks with older graphics cards. 2) If it absolutely would cause no adverse effects, deviating from upstream this way would cause an undo maintenance burden of Ubuntu. It would be strongly preferred that if something is changed from the current default behavior, it is done upstream first. Despite this, the suggestion of power_profile to reduce power consumption has been documented in the Ubuntu documentation for reducing power consumption: https://help.ubuntu.com/community/PowerManagement/ReducedPower xserver-xorg-video-ati -> Wishlist Won't Fix This does not mean that this report is closed, but that the discussion may still continue as noted in https://wiki.ubuntu.com/Bugs/Bug%20statuses . ** Changed in: xserver-xorg-video-ati (Ubuntu) Importance: Low => Wishlist ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Won't Fix ** Summary changed: - 1002:68e0 [Acer Aspire 5740] graphics card uses more power than needed when on battery + 1002:68e0 [Acer Aspire 5740] Request to change power_profile from "default" to "auto" in standard install -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/771963 Title: 1002:68e0 [Acer Aspire 5740] Request to change power_profile from "default" to "auto" in standard install To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/771963/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
