Hi Ritesh, > On Thursday 27 Aug 2009 17:39:21 Bjørn Mork wrote: > > > > Setting level 3: > > > > nemi:/etc# echo 3 > /sys/class/net/wlan0/device/power_level > > nemi:/etc# cat /sys/class/net/wlan0/device/power_level > > SYSTEM:auto MODE:fixed INDEX:3 > > > > Setting level 0: > > > > nemi:/etc# echo 0 > /sys/class/net/wlan0/device/power_level > > nemi:/etc# cat /sys/class/net/wlan0/device/power_level > > SYSTEM:auto MODE:fixed INDEX:0 > > > > Notice how this is different from the default "MODE:auto". > > > > > > Setting level 6 restores the default: > > > > nemi:/etc# echo 6 > /sys/class/net/wlan0/device/power_level > > nemi:/etc# cat /sys/class/net/wlan0/device/power_level > > SYSTEM:auto MODE:auto INDEX:0 > > > > > > However level 7 seem to be gone, as reported by Clemens: > > > > nemi:/etc# echo 7 > /sys/class/net/wlan0/device/power_level > > bash: echo: write error: Invalid argument > > > > > > So there still is a difference between 0 and 6. I have absolutely no > > idea which one should be used on AC, but I do note that 6 seems to be > > the default. > > > > > > I'm not sure about this as I don't have that device. I'm copying Clemens since > he was the one of first pointed the changes. > > > A side note: The "wireless" node seems to be gone in 2.6.30: > > > > nemi:/etc# ls -la /sys/class/net/wlan0/wireless > > ls: cannot access /sys/class/net/wlan0/wireless: No such file or directory > > > > > > Again, on my box with ipw2200 device, 2.6.30 still presents the wireless > folder. with my 3945ABG card, 2.6.30 does not have this folder either. Isn't there a better way to check whether it is a wireless card?
Also I want to know how does wireless card power saving work? I know that I can set the signal power of the card using iwconfig like # iwconfig wlan0 txpower 10 but changing /sys/class/net/*/device/power_level does not change the tx-power that iwconfig reports. does this power_level have anything to do with that txpower? will reducing txpower by iwconfig help power saving at all? > r...@champaran:/usr/share/man $ ls /sys/class/net/eth1/wireless/ > beacon crypt fragment level link misc noise nwid retries status > > You must be using the newer iwlwifi drivers. > > Oops!!. There's LP Bug #369113 where I fixed similar bug for ipw2200. > I'm not sure how the wireless folder has reappeared in 2.6.30. It was reported > to not be present in 2.6.29. Sigh!! > > Perhaps wireless-tools is what should be used here too.... > > > > > You may want to apply this or something similar to get 2.6.30 support. > > I must admit that I didn't really understand the need for the > > "-d $DEVICE/wireless" test. Testing the driver name should be safe > > enough. > > > > I'm not sure how you plan testing the driver name ? As wlan* ? > Take my case, the wireless device is listed as eth1. Checking for the > "wireless" folder's existence was one way to identify it a wireless device. > > The sysfs breakage is one reason why I want to rely on tools instead. Or if we > were using a high level language, libraries. > Regards, Darren. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
