Comment 76 for bug 1384342

14.10 is a development release of Ubuntu that is only supported for another 4 or so months - imho it is unlikely to see any kernel backport efforts in that time frame. There isn't really any point in being on an old development release of Ubuntu, if you aren't going LTS then you might as well just run the latest active development release, 15.04 will have linux 3.19.

Linux 3.19 from PPA should work fine, if it doesn't then file a bug here or at https://bugzilla.kernel.org/