2014 edit: If you’re experiencing problems on Ubuntu 14.04 with wifi on your Lenovo laptop with a Centrino wifi chipset, try disabling wireless N.
See http://ubuntuforums.org/showthread.php?t=2208210&p=12943350#post12943350
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Just updated my laptop to Natty Narwhal and I may write something about it in the future (spoiler: Unity sucks). Anyway this post is just about the solution I found for the broken wireless network manager applet in Ubuntu 10.10 and 11.04 in Lenovo B450 and probably most other Lenovo laptops.
Ever since I upgraded my laptop to Maverick Meerkat, my wireless isn’t automatically enabled on startup. It was no big deal back then since I could just simply tick the Enable Wireless in the network manager applet. But when I upgraded to Natty Narwhal, my wireless was permanently disabled.
After hours of trial and error, I found out the culprit. Running sudo rfkill list showed that I have an “acer-wireless” even though I wasn’t using an Acer machine:
bry@Abraxas:~$ sudo rfkill list
0: acer-wireless: Wireless LAN
Soft blocked: yes
Hard blocked: no
...
The solution to this was simple: disable it by adding blacklist acer-wmi at the end of /etc/modprobe.d/blacklist.conf.
I have the same problems.but your solution is failed on my computer.
root@goola:/home/goola# rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: yes
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
I think i should use the hot-key(Fn+ F5),and then….
root@goola:/home/goola# rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
is there still a answer??
a man tired tousand ways,but failed one tousand times.please, help!!!
Thanks man, totally worked!! I bought my new Lenovo last week and I couldn’t get my wifi to work till now, you saved me a terrible headache!
Worked on mine. I can enable the wireless, though I can not connect. Like it was a wrong password. Keeps me asking over and over.
Thanks a lot, after about 5 hours, I’m really glad, I’ve found your solution! –ThinkPad E520–
Thank you so much!
This solved WiFi on Lenovo 3000 V200 with Intel WiFi 4965. Crunchbang Linux based on Debian Wheezy.
Perfect! That was the only reason i stayed with 10.10, now i can update. Worked perfectly on Lenovo 3000V200
Perfect for me also. On a Lenovo 3000 V200.
Hi MIne says. Can not change this status…
3: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: yes
thnx, this solution worked for me.