On Fri, Feb 3, 2012 at 2:08 AM, Paul Menzel <[email protected]> wrote: > As I read the result OpenSUSE 12.1(?) with `kernel-default` and GNOME > has the lowest value of 11,4 Watts shown in PowerTOP. > > Using their benchmark to simulate user input the distributions compare > as follows. > > Ubuntu (Unity) 3:04 hours > Mint (GNOME) 3:14 hours > openSUSE (KDE) 3:23 hours > Mint (LXDE) 3:25 hours > Windows 7 Professional 4:05 hours > > As far as I could see they enable our power saving features like RC6 for > the Intel graphics hardware. > > Additionally they also write that although tuning a lot of setting and > PowerTOP also showing that less Watts are consumed that this did not > have a big effect on the runtime. Is there something wrong with this > setup?
yes - powertop is a diagnostics tool, and only limited as to what it can see. If hardware drivers conceal power savings features, or omit to implement them, then powertop is often (obviously) in the dark as to what is really going on in the hardware. > Additionally are there obvious explanations why Windows still runs that > much longer? Missing specs, undocumented firmware, vendor modifications to hardware, firmware, BIOS, ACPI, etc... Also, obviously (?) the vendor shipped the unit with a non-Linux OS, so a good question would be to actually ask the vendor if they have a version optimized for Linux. Auke _______________________________________________ Discuss mailing list [email protected] http://lists.lesswatts.org/listinfo/discuss
