>The Acer C720 used a 3.8 Linux kernel, as documented at [1]. Updating to a new kernel would have required a full QA of the hardware to make sure that the devic

>The Acer C720 used a 3.8 Linux kernel, as documented at [1]. Updating to a new kernel would have required a full QA of the hardware to make sure that the device drivers in a newer kernel still worked correctly with that hardware. Thanks for taking the time to explain.