On Fri, Mar 12, 2010 at 9:07 PM, Fabio Comolli <fabio.comolli@xxxxxxxxx> wrote: > Hi > > On Fri, Mar 12, 2010 at 9:49 AM, Corentin Chary > <corentin.chary@xxxxxxxxx> wrote: >> On Thu, Mar 11, 2010 at 10:28 PM, Fabio Comolli <fabio.comolli@xxxxxxxxx> wrote: >>> Hi. >>> >>> On Tue, Mar 9, 2010 at 11:58 PM, Fabio Comolli <fabio.comolli@xxxxxxxxx> wrote: >>>> Hi. >>>> I have an EeePC 900 running 2.6.34-rc1. >>>> >>>> If I boot it on AC the cpu runs at full speed, 900MHz; if I boot it on >>>> battery it runs only at 630Mhz. Plugging / unplugging the AC does not >>>> change the cpu frequency. Only a reboot can change the situation. >>>> >>>> I already tried to echo 0 or 1 to the >>>> /sys/devices/platform/eeepc/cpufv file; no effects, even if the file >>>> changes its value. >>>> >>>> This is not a regression from 2.6.33: this behavior is also present in >>>> that version. >>>> >>>> Does this ring any bells? This is really annoying, especially when >>>> trying to watch a movie on battery. Also 3D apps show a 30% >>>> performance drop, as expected. >>>> >>>> Regards, >>>> Fabio >>> >>> Well, it turns out that this is indeed a regression, but I don't know >>> from which kernel version. >>> I reverted (not cleanly) this patch: >>> >>> http://patchwork.kernel.org/patch/28591 >>> >>> and now >>> >>> echo 1 > /sys/devices/platform/eeepc/cpufv >>> >>> enables the powersave mode and >>> >>> echo 0 > /sys/devices/platform/eeepc/cpufv >>> >>> enables the performance mode. >>> >>> Tested with the non-benchmark glxgears (275 frames/sec in powersave >>> mode and 405 in performance mode) and stellarium (14 frames and 20 >>> frames). >>> >>> Regards, >>> Fabio >>> >> >> Thanks for the report, >> Could you try to add a quick printk to show the value stored in >> set_acpi(CM_ASL_CPUFV, value); ? >> And also, could you send the result of acpidump ? >> Thanks, > > After the revert there is no set_acpi(CM_ASL_CPUFV, value) anymore. > Please find the acpidump in attachment. > > Regards, > Fabio Yep, I know, but un-revert the patch, and add a printk :p Could you also send the result of: /* clean boot */ cat cpufv echo 0 > cpufv cat cpufv echo 1 > cpufv cat cpufv Thanks, -- Corentin Chary http://xf.iksaif.net -- 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
