In no way do I guarantee this will work for everyone, but give it a shot if you have the brightness bug. The patch makes no permanent changes and does not require elevated access to install. It's all local to the user and does not make any system changes. It has a provided uninstaller just in case things go awry!
The README in the .zip contains all information about the files that will be installed and what they do. The patch is a collective of two open source applications to control the screen and brightness via command line, and some bash scripting by me. It requires the Terminal to install for now... I don't know a thing about making a GUI Installer but if anyone can provide any tips, I would be greatful!
Download the zip, use Terminal to install by navigating to the file and typing "./install.sh", then log out or reboot to enable the patch.