I just installed Ubuntu 15.10 on my dell latitude 3340 and now i cannot enable wifi since it is greyed out. Is there anyone who can help me with this? Any help is much appreciated!
PS here is a link with additional info about my wifi: http://paste.ubuntu.com/12999579/
dmesg | grep rename results in:
[ 1.308743] e1000e 0000:00:19.0 eno1: renamed from eth0
[ 2.600819] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0
In my Dell 5521, the problem is related to renaming of the wireless adapter at boot time.
To prevent adapter renaming, I use a kernel parameter net.ifnames=0
Open a terminal window (Ctrl+Alt+t), and enter:
sudo nano /etc/default/grub
Change the line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash net.ifnames=0"
Press Ctrl+o and Ctrl+x to save and exit, then enter
sudo update-grub
sudo reboot
