Comment 191 for bug 556782

According to https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=35eecf052250f663f07a4cded7d3503fd1b50729 and https://bugs.freedesktop.org/show_bug.cgi?id=35457 this bug is finally fixed in the upstream 3.13-rc5 kernel. A PPA of this kernel is available at http://kernel.ubuntu.com/~kernel-ppa/mainline/ and instructions on how to install and uninstall it are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds