Comment 14 for bug 814250

@Mark Cotton: to install, just download the linux-image package for your arch/flavour. If you don't know which arch/flavour, to discover you can type in a terminal "uname -r -m", so you can check if you have a x86_64 generic, i386 (i686) generic, i386 (i686) generic-pae. So for example if you have an x86_64 install, just download the file
linux-image-2.6.38-11-generic_2.6.38-11.47+lp814250r1_amd64.deb

After you download the required deb file, install by double cliking on it on file manager, or in a terminal by doing "sudo dpkg -i <.deb file>"