Tried the ‘release candidate’ version of Kernel 4.2.1 (via patch, at https://www.kernel.org/pub/linux/kernel/v4.x/stable-review), and the GPL_only issue with NVIDIA drivers is still there…      Exactly why we have to wait for Kernel 4.3 for this to be fixed is a mystery, as the simple one-line patch was proposed weeks ago, for 4.2-rc5.. Robert Gadsdon.   September 19, 2015.