I cannot use the wireless network from my Sony VAIO E series laptop. My OS is Ubuntu 12.04. Please help.
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I had the same problem. My wireless option was grayed out in network manager.
Solution: Blacklist mac80211 and voilà!
Ubuntu 12 and sony vaio e 14 series
This is not invented by me, but credited to answers from others in the web. Thanks to them.
Bought new Sony Vaio E Series. Installing using CD, Ubuntu 12.04. During installation wireless worked. After reboot NO!. Can not enable wireless.
I found there:
rfkill list all
rfkill unblock all
rfkill list all, works, and show: soft blocking in 'acer-wireless: Wireless LAN, soft blocked: yes'
rfkill unblock all does not manage to change. After another rfkill list all, same status remains.
Then I learned from rfkill list - How to unblock?. Thanks, Leckensteyn.
sudo modprobe -r acer_wmi
It works. Wireless Networks works 'normal' as it should be.