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Thread: Ubuntu 10.10 freezes when using wireless on battery

  1. #21
    Join Date
    May 2010
    Beans
    1

    Re: Ubuntu 10.10 freezes when using wireless on battery

    Hi,

    I have been having problems with my Dell Studio 15 freezing intermittently when on battery for months. I have read many, many posts on this topic and tried many different tweaks to no avail. Reverting to an earlier version of pm_utils worked, but I lost the ability to put my laptop on standby, so that was no good. I decided it was time for me to do some analysis and try a few tweaks of my own. Well, it looks like I have come up with a successful work around that should work for any type of wireless card.

    I run Mint 10 and have the latest version of pm-utils installed - 1.4.1. tailing /var/log/pm-powersave.log reveals that /usr/lib/pm-utils/power.d/wireless is called to put the wireless card into powersave mode when the power cord is removed. I found the specific section of code that makes that change is at the end of the script:

    case $1 in
    true) wireless_powersave on;;
    false) wireless_powersave off ;;
    *) exit $NA ;;
    esac

    I simply changed it to:

    case $1 in
    true) wireless_powersave off;;
    false) wireless_powersave off ;;
    *) exit $NA ;;
    esac

    This results in the card never being put into powersave mode and has stopped the freezing. This change does not appear to affect the power consumption either. So, all is well and I have said goodbye a very frustrating problem. I hope it works for you too.

    FYI, my wireless card is a Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)

  2. #22
    Join Date
    Mar 2008
    Beans
    25

    Re: Ubuntu 10.10 freezes when using wireless on battery

    In case this didn't work for others as it didn't form me, I found that I had to comment out the whole section -

    #case $1 in
    #true) wireless_powersave off;;
    #false) wireless_powersave off ;;
    #*) exit $NA ;;
    #esac

    I can only assume that its the setting the powersave mode at all that is the issue, not just turning it on.

    My Dell Studio works fine now.

  3. #23

    Re: Ubuntu 10.10 freezes when using wireless on battery

    toshiba tecra a-9
    nvidia 300 on xserver (nvidia never works right)
    12.04

    removed nouveau firmware in syn app and now switching power sources works great

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