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mkb/gist:40bf48bc401ffa0cc4d3

Last active March 3, 2022 19:12
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  1. mkb revised this gist May 28, 2014. 1 changed file with 32 additions and 0 deletions.
    32 changes: 32 additions & 0 deletions gistfile2.md
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    OK, new theory: pm-utils is disabling the interface.

    Based on [pm-utils info on ArchWiki](https://wiki.archlinux.org/index.php/pm-utils) I found a hook invoking wpa_supplicant to disable the wifi interface:

    $ cat /usr/lib/pm-utils/sleep.d/60_wpa_supplicant

    #!/bin/sh

    # /etc/pm/sleep.d/60_wpa_supplicant
    # Action script to notify wpa_supplicant of pm-action events.

    PATH=/sbin:/usr/sbin:/bin:/usr/bin

    WPACLI=wpa_cli

    case "$1" in
    suspend|hibernate)
    $WPACLI suspend
    ;;
    resume|thaw)
    $WPACLI resume
    ;;
    esac

    exit 0

    To disable that hook I created a dummy hook in 1/etc/pm/sleep.d/`:

    sudo touch /etc/pm/sleep.d/60_wpa_supplicant
    sudo chmod 644 /etc/pm/sleep.d/60_wpa_supplicant # Instructions said no exec flag

    I rebooted for good measure. We'll see whether this one takes.
  2. mkb created this gist May 14, 2014.
    47 changes: 47 additions & 0 deletions gistfile1.md
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    Too early to tell whther this solved my problem but recording for posterity anyway. In theory this will stop my Raspberry Pi from dropping off the network after it has been idle for a while.


    ## Before

    pi@dashboard ~ $ iwconfig
    wlan0 IEEE 802.11bgn ESSID:"Professor Ping"
    Mode:Managed Frequency:2.437 GHz Access Point: B8:E6:25:9B:62:02
    Bit Rate=39 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:off Fragment thr:off
    Power Management:on
    Link Quality=43/70 Signal level=-67 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:70 Invalid misc:14 Missed beacon:0

    lo no wireless extensions.

    eth0 no wireless extensions.

    Note: **`Power Management:on`**


    ## Then

    sudo nano /etc/network/interfaces

    add line: `wireless-power off`


    ## After

    pi@dashboard ~ $ iwconfig
    wlan0 IEEE 802.11bgn ESSID:"Professor Ping"
    Mode:Managed Frequency:2.437 GHz Access Point: B8:E6:25:9B:62:02
    Bit Rate=26 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:off Fragment thr:off
    Power Management:off
    Link Quality=43/70 Signal level=-67 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:29 Invalid misc:8 Missed beacon:0

    lo no wireless extensions.

    eth0 no wireless extensions.

    Note: **`Power Management:off`**