Paul, regarding only the iMac 14,2 could you please test the latest mainline kernel via http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc2-utopic/ and advise to the results?
Paul, regarding only the iMac 14,2 could you please test the latest mainline kernel via http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.17-rc2- utopic/ and advise to the results?