Thanks Dave - as per your recommendation for people with the Gigabyte U2442 laptop series (and perhaps others) for whom the fixes above don't work, I've created a new bug report: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1272777
Thanks Dave - as per your recommendation for people with the Gigabyte U2442 laptop series (and perhaps others) for whom the fixes above don't work, I've created a new bug report: https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1272777