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Possible Duplicate:
Lenovo b570 Broadcom Corporation BCM4313 wireless doesn't work

I´ve got the following problem on my new notebook:

I installed Ubuntu 11.10 and I can not enable wireless connection on network panel.

I´m on the network panel (part of system panel) and cant switch the on/off button from "off" to "on" because it jumps instantly back to "off"

I don't know what to do, because I already had a stable wlan connection - 2 times... But I don't know what I´ve done to fix it.

I have got no Windows or other OS on my notebook.

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marked as duplicate by fossfreedom Mar 3 '12 at 21:42

This question was marked as an exact duplicate of an existing question.

You can fix the problem doing the following:

Open a Terminal window. Type:

sudo rfkill list

If you get:

0: acer-wireless Wireless LAN
        Soft blocked: yes
        Hard blocked: no

Go to /etc/modprobe.d

Edit the file with root privileges:

sudo nano blacklist.conf 

Add the line to disable it:

blacklist acer-wmi
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