Comment 5 for bug 1003793

I have this same Dell mini v10 (Inspiron 910) with a Broadcom Corporation BCM4312 802.11b/g. In general it works OK, but requires some firmware found in linux-firmware-nonfree.

If you've installed the Broadcom wl binary driver, then the kernel drivers won't work since they are all black listed in /etc/modprobe.d/blacklist-bcm43.conf

You can check to see if Jockey has installed the binary driver:

dpkg -l | grep bcmwl-kernel-source

The only way the Quantal kernel will work is if you remove the wl driver:

sudo apt-get remove bcmwl-kernel-source
sudo apt-get purge bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree