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Thread: Dell studio lost wifi power while depends on battery

  1. #1
    Join Date
    Dec 2008
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    95
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    Ubuntu 10.10 Maverick Meerkat

    Dell studio lost wifi power while depends on battery

    Hi all, I'm expecting a issue with my latptop (dell studio 1558) and its wireless card (broadcom bcm 4312, I use broadcom sta drivers). When I use the energy adapter it goes fast, good signal and all, but when I disconnect it and use the battery it goes slow as hell (less than 2mb) and makes bad ping for everything(more than 200ms).

    I've not seen any option in the battery panel to increase its perfomance, what could be the problem?

    Sorry for my english and thanks for the help.

  2. #2
    Join Date
    Dec 2008
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    95
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    Ubuntu 10.10 Maverick Meerkat

    Re: Dell studio lost wifi power while depends on battery

    Some help? Is anybody expecting the same problem? I can't even use the laptop for what was designed for -portability- without proper wifi power.

    Is there a hidden power option for that?

    @Edit (Some information):

    With AC adapter:



    eth1 IEEE 802.11bg ESSID:"WLAN_C0"
    Mode:Managed Frequency:2.462 GHz Access Point: <I'll hide it>
    Bit Rate=54 Mb/s Tx-Power:24 dBm
    Retry min limit:7 RTS thr: off Fragment thr: off
    Encryption key: off
    Power Management: off
    Link Quality=5/5 Signal level=-57 dBm Noise level=-90 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:503 Invalid misc:0 Missed beacon:0
    Battery:



    eth1 IEEE 802.11bg ESSID:"WLAN_C0"
    Mode:Managed Frequency:2.462 GHz Access Point: <I'll hide it>
    Bit Rate=54 Mb/s Tx-Power:24 dBm
    Retry min limit:7 RTS thr: off Fragment thr :off
    Encryption key: off
    Power Managementmode:All packets received
    Link Quality=4/5 Signal level=-58 dBm Noise level=-89 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:503 Invalid misc:0 Missed beacon:0
    The only difference I can appreciate is the power management mode, as highlighted. I'll try this http://ubuntuforums.org/showthread.php?t=1360901 and see if it actually works.

    Sorry for my english.
    Last edited by morefeo; October 22nd, 2010 at 02:00 AM.

  3. #3
    Join Date
    Jan 2008
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    7
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    Ubuntu 8.10 Intrepid Ibex

    Re: Dell studio lost wifi power while depends on battery

    Hi,

    are you still experiencing this problem? I have a simmilar one but far more drastic.
    withour the power cable im barely able to open a site.

    the solution from your link helped?

  4. #4
    Join Date
    Dec 2008
    Beans
    95
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    Ubuntu 10.10 Maverick Meerkat

    Re: Dell studio lost wifi power while depends on battery

    Nope, it didn't help, but now I'm expecting the problem with AC adapter too.

    For now this command works: sudo iwconfig wlan0 power off

    While wlan0 is the name of your wifi connection in iwconfig.

  5. #5
    Join Date
    Jan 2008
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    Ubuntu 8.10 Intrepid Ibex

    Re: Dell studio lost wifi power while depends on battery

    yeah,
    "sudo iwconfig wlan0 power off(eth1 in my case)" is working. It can be easy added into some kind off autostart to the init.d but..............

    I dont this this is proper way to do it. looks like a bug to me.....

    did you noticed any weird behaviour after applying this command?

  6. #6
    Join Date
    Dec 2008
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    95
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    Ubuntu 10.10 Maverick Meerkat

    Re: Dell studio lost wifi power while depends on battery

    Quote Originally Posted by bontana View Post
    yeah,
    "sudo iwconfig wlan0 power off(eth1 in my case)" is working. It can be easy added into some kind off autostart to the init.d but..............

    I dont this this is proper way to do it. looks like a bug to me.....

    did you noticed any weird behaviour after applying this command?
    No at this time.

  7. #7
    Join Date
    Feb 2009
    Beans
    33

    Re: Dell studio lost wifi power while depends on battery

    This has been driving me CRAZY!!! Thanks for the post - it is working for me too - now. Until I read your post, I didn't make the connection between bad wifi connection and no power

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