Disable intel wifi led blinking

I just build a 3.0 kernel for Ubuntu(I have a hp 6910p laptop).

It is really annoying that when these is network traffic, the wifi led will keep blinking. It's really a stupid feature. I wanna disable it.

After google, I find this page:

I tried the second approach. But it does not work. I finally feature out that I didn't configure wifi driver as a module. I built it into kernel. Of cause I can pass the parameter to kernel in grub. But I prefer building wifi driver as a module. Here is the configuration in kernel:

  Intel Wireless WiFi 4965AGN (iwl4965)

and then issue this cmd:

#echo "options iwl-legacy led_mode=1" >> /etc/modprobe.d/wlan.conf

For legacy kernels(2.6.*) provided by ubuntu, the module name is iwlcore, so I need to keep "options iwlcore led_mode=1" line in the file in case I switch to the old kernel.