The wifi connectivity indicator on this laptop was flashing continuously when using the wifi. It was absolutely maddening since the indicator is on the top of the keyboard and the indicator LED is large and blue. This flashing was present on the live disc and after installation.
The wifi card:
Network controller [0280]: Intel Corporation Centrino Wireless-N 1000 [8086:0084]
Google found an answer to the flashing wifi in passing a configuration option to the iwlwifi driver.
The wl.conf file however specifically states:
# modules.d configuration file for WL
# Internal Aliases - Do not edit
Is there a real reason not to edit wl.conf?
This will stop the indicator from flashing:
echo "options iwlwifi led_mode=1" >> /etc/modprobe.d/wl.conf
reboot
This has been working since installation.