Blinking WiFi led (Debian on HP6730b)

Blinking wifi led on my laptop really annoys me: this problem appeared after regular update. Google says that it's known issue, so how to cope with it?

Assume you use iwlagn module for Intel wireless card. It might be iwl3945 or something similar: just use your module name instead of iwlagn in steps below.

So, firstly, look at lsmod to check Intel wifi module name:
$ lsmod | grep w
iwlagn                150691  0
usb_wwan               12950  1 option
usbserial              27298  2 option,usb_wwan
...

Secondly, find out led options with modinfo:
# modinfo iwlagn | grep led
parm:       led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking (int)
parm:       plcp_check:Check plcp health (default: 1 [enabled]) (bool)
parm:       ack_check:Check ack health (default: 0 [disabled]) (bool)

As light is blinking, we conclude that default value is not good enough. Let set more convenient value "1", so led would be on when the adapter is turned on, and off when the adapter is off.

Create file /etc/modprobe.d/wlan.conf with single line:
options iwlagn led_mode=1

Finally, reboot the laptop or just execute:

rmmod iwlagn

modprobe iwlagn

Now LED is solid blue when on and solid amber when off.