[Bug 508938] [NEW] power management not enabled with iwlagn module

[Sergio Cambra]

Public bug reported:

Binary package hint: laptop-mode-tools

I have a Network controller: Intel Corporation WiFi Link 100 Series
[8086:0083], and I enabled power saving with laptop-mode-tools
(CONTROL_IWL_POWER=1) but it doesn't work because interface is not
detected (there is no /sys/class/net/wlan0/wireless file). I tried with
/usr/share/laptop-mode-tools/modules/wireless-iwl-power from lucid,
because it fixes that bug, but it doesn't work too because it tries to
write in /sys/class/net/wlan0/device/power_level but it doesn't exist.

I installed linux-backports-modules-wireless-karmic-generic package, and
I can enable power management with "iwconfig wlan0 power on". Changing
"echo $IWL_AC_POWER > /sys/class/net/$IF/device/power_level" with
"$IWCONFIG $IF power off" and "echo $IWL_BATT_POWER >
/sys/class/net/$IF/device/power_level" with "$IWCONFIG $IF power on"
fixes it.

** Affects: laptop-mode-tools (Ubuntu)
     Importance: Undecided
         Status: New

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power management not enabled with iwlagn module
https://bugs.launchpad.net/bugs/508938
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