On Sun, May 24, 2009 at 11:28 AM, Alan Jenkins <sourcejedi.lkml@xxxxxxxxxxxxxx> wrote: > On 5/16/09, Len Brown <lenb@xxxxxxxxxx> wrote: >> From: Grigori Goronzy <greg@xxxxxxxxxxxx> >> >> The older eeepc-acpi driver allowed to control the SHE performance >> preset through a ACPI function for just this purpose. SHE underclocks >> and undervolts the FSB and undervolts the CPU (at preset 2, >> "powersave"), or slightly overclocks the CPU (at preset 0, >> "performance"). Preset 1 is the default setting with default clocks and >> voltage. >> >> The new eeepc-laptop driver doesn't support it anymore. >> The attached patch adds support for it to eeepc-laptop. It's very >> straight-forward and almost trivial. >> >> Signed-off-by: Grigori Goronzy <greg@xxxxxxxxxxxx> >> Signed-off-by: Corentin Chary <corentincj@xxxxxxxxxx> >> Signed-off-by: Len Brown <len.brown@xxxxxxxxx> >> --- > > Hi, out of curiosity I tried this on my EeePC 701. I upgraded the > BIOS to the latest version available a few months ago. > > I find that the file is present and can successfully be read from. > The file returns the value "513". If I write "1" to it, nothing > happens. If I write "0" to it, the speakers start hissing and the > file then returns the value "512". Writing "1" again gets it back to > normal. There is no apparent effect on performance. > > This is stupid, because we _do_ appear to check the BIOS supported > features bitmask, but that's Asus firmware for you. Can you please > add an extra test, so this file only allows reads or writes if the > current value is 0 or 1? If you're quick you might slip it into -rc8 > :-). > > I think this is the only attribute which needs this treatment. It > looks like the SHE feature may have been attempted for the 701 model, > but not completed on time. > > Thanks! > Alan > Hi, Thanks for the repport. Can you send me your dsdt ? I can't upgrade my bios right now. Thanks -- Corentin Chary http://xf.iksaif.net - http://uffs.org -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
