Disable wlan0 power management

[Ginosal]

Hi everybody. Since wlan0 power management causes malfunctions to my Atheros wireless device, I need to disable power management in order to get a good internet connection even when the computer is battery powered. Power management is set "off" when I plug in wall power and is set "on" when I unplug it. I want to set it always "off". I can do it by using:

sudo iwconfig wlan0 power off

But when I reboot, I have to do it again! I've tried adding that command to rc.locale, before exit 0, but nothing happens. Then I've tried adding the following lines to /etc/network/interfaces

auto wlan0
iface wlan0 inet dhcp
wireless-power off

but nothing. What else can I do? Thank you in advance!

[Zookalicious]

I can't give you the source where I read this from (can't bloody well remember) but I just did this same thing two days ago and this is what I did.

gksu gedit /etc/pm/power.d/wireless

and then I just put

#!/bin/sh

/sbin/iwconfig wlan0 power off

In the file.

Lastly,

sudo chmod +x /etc/pm/power.d/wireless

According to the thread that works, and my connection seems significantly more stable now when I try and get on the campus wifi.

Hope that helps!

[Ginosal]

I can't give you the source where I read this from (can't bloody well remember) but I just did this same thing two days ago and this is what I did.

...

Hope that helps!

Hi Zookalicious. Thank you, I'll try your solution, but I must admit that I've found another one while I was waiting for an answer. I'm writing it here, maybe someone will need it. In my first post, I've written that I have also edited /etc/rc.local and added

/sbin/iwconfig wlan0 power off

But I did not consider that I have to make that command run AFTER the association of the wlan0 connection. So, before the above-mentioned command, I also added

sleep 30

Of course, everything before "exit 0". Well, it seems to work fine!

I'll try Zook's solution and I will write about it later! Thank you anyway!

[Ginosal]

I can't give you the source where I read this from (can't bloody well remember) but I just did this same thing two days ago and this is what I did.

gksu gedit /etc/pm/power.d/wireless

and then I just put
In the file.

Lastly,

sudo chmod +x /etc/pm/power.d/wireless

According to the thread that works, and my connection seems significantly more stable now when I try and get on the campus wifi.

Hope that helps!

This solution works, too, and works better then the first I've used. rc.local solution worked, too, but there was a problem. as I plugged in and then plugged out again AC power, power management was set to "on" again. But with the solution suggested by Zook, power management for wlan0 will ALWAYS be switched off... Thank you Zook!

[Zookalicious]

Excellent! Glad that worked for you

[J Caffrey]

I have a clean install of 11.04. When I try to copy and paste Zook's commands into terminal the file opens but it's blank. I close it without saving and "no such file or directory errors" appears in terminal. What am I doing wrong? This is what appears in terminal. john@john-WIM2180:~$ gksu gedit /etc/pm/power.d/wireless

(gedit:2856): Gtk-WARNING **: Attempting to set the permissions of `/root/.local/share/recently-used.xbel', but failed: No such file or directory

(gedit:2856): Gtk-WARNING **: Attempting to store changes into `/root/.local/share/recently-used.xbel', but failed: Failed to create file '/root/.local/share/recently-used.xbel.Y738UV': No such file or directory

(gedit:2856): Gtk-WARNING **: Attempting to set the permissions of `/root/.local/share/recently-used.xbel', but failed: No such file or directory
john@john-WIM2180:~$

[Ginosal]

I have a clean install of 11.04. When I try to copy and paste Zook's commands into terminal the file opens but it's blank. I close it without saving and "no such file or directory errors" appears in terminal. What am I doing wrong?:confused

If you're talking about /etc/pm/power.d/wireless , it doesn't exist, you must create it from scratch and add

#!/bin/sh

/sbin/iwconfig wlan0 power off

then save.

[J Caffrey]

Thanks for that its working perfectly. I'm a bit rusty having made a comeback to ubuntu.

[Ginosal]

Thanks for that its working perfectly. I'm a bit rusty having made a comeback to ubuntu.

I'm happy I could help you like Zook helped me...

[kozhy]

thank you , i solved this problem. it was kill me