Reproducible on ASUS UX305fa sudo dmidecode -s bios-version UX305FA.210
uname -a Linux 3.19.0-30-generic #33-Ubuntu SMP Mon Sep 21 20:58:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Also tried on BIOS version 208. Got the same result.
Still able to control brightness using software methods.
Reproducible on ASUS UX305fa
sudo dmidecode -s bios-version
UX305FA.210
uname -a
Linux 3.19.0-30-generic #33-Ubuntu SMP Mon Sep 21 20:58:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Also tried on BIOS version 208. Got the same result.
Still able to control brightness using software methods.