Wireless doesn't work on a Lenovo V570

ok - you most probably have a similar issue as other similar laptop users:

You may be suffering from a clash with the acer-wmi kernel module.

rfkill list all says it is "acer-wireless: soft blocked: yes" then you need to run the following:

sudo modprobe -r acer-wmi
cd /etc/modprobe.d
sudo nano blacklist.conf

Then add blacklist acer-wmi as a new line at the end of the file.

Save and reboot.

Rerun sudo lshw -class network and rfkill list all

You should not be soft-blocked (i.e. rfkill says no to all responses).

lshw should not say "unclaimed" - if it does then use this answer to resolve this.

I had the same problem on a Lenovo B570, for some reason when you install Ubuntu 11.10 it switches off the wireless. You have to blacklist the acer-wmi as listed above then boot back into windows and turn on wireless in windows systray then reboot back into Ubuntu and walaa. Don't know why, just know after installing both Mint 11 and then Ubuntu 11.10 it is the only way it would remove the "softblocked:yes". Found this quite by accident needing wireless.