When data is being transferred via wireless network,the blinking LED light indicates the wireless is on.This tutorial shows how to stop this annoying blinking light,and so that your laptop has a constant on (or off) LED light when wireless’s working (or not).

Open up a terminal window from Applications -> Accessories -> Terminal,use following command to edit the “/etc/modprobe.d/wlan.conf” file (if it’s not existent,the command will create one with blank).

gksudo gedit /etc/modprobe.d/wlan.conf
  • For 10.10 and 11.04, add this line at the end of the file,and save it.

    options iwlcore led_mode=1

  • For 11.10, add this line to the end of file:

    options iwlagn led_mode=1

  • For Ubuntu 12.04, add this line:

    options iwlwifi led_mode=1

Now,restart your machine and problem should be fixed !

UPDATE: You may found that MODULE NAME changes depend on Ubuntu version and kernel version, here’s a list:

1. Ubuntu 13.04 (Raring Ringtail) – kernel series 3.8
iwlwifi for Intel Centrino Wireless-N series 1xx, 1xxx, 2xx, 2xxx, 5xxx, 6xxx
iwlegacy for Intel Wireless series 3945 (tested), 4965
ipw2200 with led=0 for Intel Pro/Wireless 2200BG, 2915ABG
ath9k with blink=0 for Atheros wireless cards using the ath9k driver
2. Ubuntu 12.04 (Precise) – kernel series 3.2
iwlwifi for Intel Centrino Wireless-N series 1xx, 1xxx, 2xx, 2xxx, 5xxx, 6xxx
iwl-legacy for Intel Wireless series 3945, 4965
ipw2200 with led=0 for Intel Pro/Wireless 2200BG, 2915ABG
ath9k with blink=0 for Atheros wireless cards using the ath9k driver
3. Ubuntu 11.10 (Oneiric) – kernel series 3.0
iwlagn for Intel Centrino Wireless-N series 1xx, 1xxx, 2xx, 2xxx, 5xxx, 6xxx
iwl-legacy for Intel Wireless series 3945, 4965
ipw2200 with led=0 for Intel Pro/Wireless 2200BG, 2915ABG
ath9k with blink=0 for Atheros wireless cards using the ath9k driver
4. Ubuntu 11.04 (Lucid) – kernel series 2.6
iwlcore for Intel Centrino Wireless-N series 1xx, 1xxx, 2xx, 2xxx, 3945, 4965, 5xxx, 6xxx
ipw2200 with led=0 for Intel Pro/Wireless 2200BG, 2915ABG
ath9k with blink=0 for Atheros wireless cards using the ath9k driver
5. Ubuntu 10.04 (Lucid) – kernel series 2.6
The default for supported Intel Centrino cards in 10.04 is to simply keep the LED on if wireless is on (and off otherwise), so this “mod” should not be needed (thanks htorque!)
ipw2200 with led=0 for Intel Pro/Wireless 2200BG, 2915ABG
ath9k with blink=0 for Atheros wireless cards using the ath9k driver