Public bug reported:
Power management on intel wireless cards is never turned on unless one
adds two scripts to do so.
To use laptop-mode by default:
Code:
sudo gedit /etc/default/acpi-support
Scroll down change laptop-mode to true:
Code:
ENABLE_LAPTOP_MODE=true
For some reason, laptop-mode is only started when the AC is unplugged.
This might seem fine unless you bootup the laptop on the battery, in
which case laptop-mode never gets started. Thus, to enable laptop-mode
at boot (taken from a lost thread):
Code:
sudo update-rc.d laptop-mode multiuser
Now that laptop-mode is started automatically, we can make sure it
manages the power saving on the intel wireless cards (ipw3945 & iwp2200
use different commands) this way.
To use the power management, you will need to install the wireless
tools:
Code:
sudo apt-get wireless-tools
For ipw3945 cards:
On battery:
Code:
sudo gedit /etc/laptop-mode/batt-start/20-wireless.sh
Code:
#!/bin/sh iwpriv eth1 set_power 7
Code:
sudo chmod +x /etc/laptop-mode/batt-start/20-wireless.sh
On AC:
Code:
sudo gedit /etc/laptop-mode/batt-stop/20-wireless.sh
Code:
#!/bin/sh iwpriv eth1 set_power 0
Code:
sudo chmod +x /etc/laptop-mode/batt-stop/20-wireless.sh
For ipw2200 cards (taken from here):
On battery:
Code:
sudo gedit /etc/laptop-mode/batt-start/20-wireless.sh
Code:
#!/bin/sh iwconfig eth0 power on
Code:
sudo chmod +x /etc/laptop-mode/batt-start/20-wireless.sh
On AC:
Code:
sudo gedit /etc/laptop-mode/batt-stop/20-wireless.sh
Code:
#!/bin/sh iwconfig eth0 power off
Code:
sudo chmod +x /etc/laptop-mode/batt-stop/20-wireless.sh
At that point, power management works.
Nic
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
--
power management on ipw2200 and ipw3945
https://launchpad.net/bugs/80980
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