Neal Becker wrote:
Neal Becker wrote:
> Also, I created a new test user. He also cannot control screen brightness,
> confirming it's not due to any old settings in my own account.
>
It looks like a lot of people have seen similar issues, here is an example:
https://bbs.archlinux.org/viewtopic.php?pid=1229185
Hey guess what? If I set kdm as displaymanager, problem is fixed!