NOTE: This guide assumes that your bios version is 211 or higher. If you haven’t already done it, download the update from here.
If you’re on Ubuntu 13.04, see here.
1) Upgrade your kernel to version 3.5.2 (or, presumably, newer). Assuming we’re dealing with a 64-bit system:
$ mkdir /tmp/new_kernel
$ cd /tmp/new_kernel
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.2-quantal/linux-headers-3.5.2-030502-generic_3.5.2-030502.201208151151_amd64.deb
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.2-quantal/linux-headers-3.5.2-030502_3.5.2-030502.201208151151_all.deb
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.2-quantal/linux-image-3.5.2-030502-generic_3.5.2-030502.201208151151_amd64.deb
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.2-quantal/linux-image-extra-3.5.2-030502-generic_3.5.2-030502.201208151151_amd64.deb
$ sudo dpkg -i *.deb
2) Reboot
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