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#1 2012-10-11 16:10:52

beetlejuice7
Member
Registered: 2012-02-28
Posts: 49

Unable to turn on wifi power saving thinkpad t410

Hi --
I'm having a bit of trouble getting my wireless power-saving to work.  I'm using TLP, which has a wireless power save option which I've set to "on".  However, when I run iwconfig it appears power-saving is disabled:

wlan0     IEEE 802.11bgn  ESSID:"dd-wrt"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 68:7F:74:08:05:81   
          Bit Rate=18 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-37 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:221   Missed beacon:0

When I try setting it manually I get an error:

sudo iwconfig wlan0 power on
Error for wireless request "Set Power Management" (8B2C) :
    SET failed on device wlan0 ; Operation not supported.

Here's the relevant output of lspci:

03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller (rev 10)

I'm using the rtl8192se module, which has an option "ips" which enables link power saving.  It defaults to "on", but I manually turned it on as well.  Still no dice.

Does anyone have any ideas on how I can get wireless power-saving to work?  Anyone with a thinkpad t410 had any luck?

Thanks in advance!

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#2 2012-10-11 17:03:37

bwat47
Member
Registered: 2009-10-07
Posts: 637

Re: Unable to turn on wifi power saving thinkpad t410

You could try installing the "iw" package and see if that gives you any luck:

iw dev wlan0 set power_save on

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#3 2012-10-11 17:06:13

beetlejuice7
Member
Registered: 2012-02-28
Posts: 49

Re: Unable to turn on wifi power saving thinkpad t410

With iw I get:

command failed: Operation not supported (-95)

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#4 2012-10-11 17:47:21

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: Unable to turn on wifi power saving thinkpad t410

The realtek power saving feature does not work.  At least I could never get it to work, nor could I ever find relevent documentation regarding powersaving on the device.  It is kind of crappy IMO.

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#5 2012-10-11 17:58:08

beetlejuice7
Member
Registered: 2012-02-28
Posts: 49

Re: Unable to turn on wifi power saving thinkpad t410

Well, I know it should theoretically be possible to turn on wifi powersaving because when I was running linux mint debian edition previously (3.2.0) everything worked fine.

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