The bug still exists on the latest mainline:
Linux tree 4.4.0-rc1-phoronix #3 SMP Wed Nov 18 10:31:11 EST 2015 x86_64 x86_64 x86_64 GNU/Linux
Asus Zenboox UX305CA-FC022T
The bug still exists on the latest mainline:
Linux tree 4.4.0-rc1-phoronix #3 SMP Wed Nov 18 10:31:11 EST 2015 x86_64 x86_64 x86_64 GNU/Linux
Asus Zenboox UX305CA-FC022T