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I can't enable power management functions on my Broadcom BCM4311 WLAN card (as sugested by PowerTOP) Here are some prints:

root@grumpy:~# lspci -vnn | grep 14e4
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)

root@grumpy:~# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off

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

The machine is Dell D420, running Ubuntu 11.10. I always had problems with my WiFi driver and currently use the package firmware-b43-installer, and manually load the b43 module.

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closed as too localized by jrg Mar 2 '12 at 13:04

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1 Answer 1

Try to use proprietary STA driver. It seems to work for me.

eth1      IEEE 802.11bg  ESSID:"ASWIFIUS"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:1B:FC:91:8D:65   
          Bit Rate=54 Mb/s   Tx-Power:24 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr:off
          Power Managementmode:All packets received
          Link Quality=5/5  Signal level=-45 dBm  Noise level=-57 dBm
          Rx invalid nwid:0  Rx invalid crypt:2  Rx invalid frag:0
          Tx excessive retries:1  Invalid misc:0   Missed beacon:0

# iwconfig eth1 power on
#
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Well, I tried it and the broadcom drivers cause segmentation fault. Had to pull out my WiFi card to boot the system and blacklist the module :) –  Halik Nov 22 '11 at 19:07
    
@Halik weird :) It works great in my case (Dell Vostro 3700). –  brownian Nov 23 '11 at 20:11
    
Well, archwiki suggests broadcom-wl is more likely to cause problems then solve them - I guess there is something to it. Either way, its not important now as I decided to order a Intel Pro with WiFi-N card, for whooping 5 bucks :) –  Halik Nov 23 '11 at 23:19

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