On 2019-10-07, David Wilson wrote: > Should I be able to use "brightnessctl" without sudo if I'm in the > "video" group? Looks like I'm not able to: > > --- > λ brightnessctl set 200 > Can't modify brightness: Permission denied > > You should run this program with root privileges. > Alternatively, get write permissions for device files.
You have to configure the udev rule in your system configuration; using
the rules shipped with the brightnessctl package works:
(udev-configuration (inherit config)
(rules (cons brightnessctl
(udev-configuration-rules config)))))
Which I pretty much took straight from the udev rule for android devices
in the manual:
https://guix.gnu.org/manual/en/html_node/Base-Services.html
live well,
vagrant
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