I use Archlinux, with acpid to configure the laptop lid behavior rather than systemd. Currently, I have it set so vbetool sets dpms off when the lid is closed, and reopening the lid sets it back on. ...
I've got a Dell Latitude E6410 notebook which changes lcd light intensity in response to ambient light levels, so it has to have some photocell. How can I access the data from this photocell? I tried ...