Newer drivers fixed the brightness problem for me too. I just added the PPA
https://launchpad.net/~ubuntu-x-swat/+archive/x-updates
and then updated my system and restarted.
Newer drivers fixed the brightness problem for me too. I just added the PPA
https:/ /launchpad. net/~ubuntu- x-swat/ +archive/ x-updates
and then updated my system and restarted.