Comment 121 for bug 250211

[Quote]
      I fixed it by installing an /etc/modprobe.d/wlan.conf with these contents:
          # 1 means do not blink
          options iwlcore led_mode=1
[/Quote]

Ok, for those guys who might be wondering how to "install" or those who do not have wlan.conf in the specified place.
For me, the wlan.conf was not there. I created and put the line there, but modprobe won't detect it.
Specially people with iwlagn driver on the 4965AGN card.

Step 1 : # cd /etc/modprobe.d
Step 2 : locate whatever wireless related file you have. Mine was intel-5300-iwlagn-disable11n.conf.
                  # ls
Step 3 : Edit the file using gedit, nano or vi whatever you are comfortable with.
                   # sudo gedit intel-5300-iwlagn-disable11n.conf
Step 4 : Put the line [options iwlcore led_mode=1] and save the file. Exit gedit.
Step 5 : Re-initiate the driver.
                  # sudo modprobe -r iwlagn (To temp unload it)
                  # sudo modprobe iwlagn (To load it back)
Step 6: Enjoy your troublefree Ubuntu. Report back if nessecary.

Gurmeet