2009/9/1 Gábor Stefanik <netrolller.3d@xxxxxxxxx>: > On Tue, Sep 1, 2009 at 11:26 PM, Andy Lutomirski<luto@xxxxxxx> wrote: >> On 2.6.30.5, I can echo 1 >/sys/class/net/wlan0/device/power_level, and the >> value changes to 1, my wakeup rate goes way down, and my power consumption >> (as measured by powertop) drops noticeably. >> >> On 2.6.31-rc7, I can still echo 1 to that file, but nothing happens, and the >> value I get if I 'cat power_level' remains at 0. >> >> My kernel configs are as identical as 'make oldconfig' knows how to make >> them. >> >> Any ideas? > > Power saving has been disabled temporarily in recent versions, as it > caused too many problems. AFAIK either there is either a modparam to > re-enable it or you can re-enable it using iwconfig (it is simply off > by default). There was talk on the mailing list whether to use a > modparam or iwconfig - I don't remember what the outcome was. I can't find it in modinfo on iwlcore, iwlagn, cfg80211, or mac80211. And iwconfig power <n> fails for all the <n> I tried. If it's intentionally disabled, shouldn't writes to the file fail? A printk explaining what's going on might also be nice. (I bet I won't be the only one to report a regression of 2.6.31 is released like this.) --Andy > >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > > > -- > Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-) > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
