I recently bought Sony Vaio Fit 15E SVF15414CXB. It has a AMD 64-bit processor and is pre-installed with Windows 8.
I installed Ubuntu 12.10 and made it dual boot. But to my surprise no wireless network is detected on Ubuntu. Even the option "Enable wireless" does not appear.
$ lshw -c network product: BCM43142 802.11b/g/n vendor: Broadcom Corporation . . . configuration : latency=0 $ iwconfig eth0 no wireless extensions lo no wireless extensions $ lspci -nn 02:00.0 Network Controller  : Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
I followed the following methods without success:
https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx --> this link does not say anything about BCM43142 chipset
tried with ndiswrapper following the procedure on Ubuntu documentation , but no luck.
http://tuxthink.blogspot.com/2013/11/installing-broadcom-bcm43142-wireless.html --> no luck - but there is no file named wireless-bcm43142-dkms_184.108.40.206-1_amd64.deb available on internet now (might be there previously), therefore this method failed.
So I'm unable to use wireless on my Ubuntu 12.10, however wired connection works.