F2/F3 Brightness Keys Not Working on Ubuntu (Argon ONE UP, CM5)

ONE UP
1

Hi Argon team,

I’m using a CM5-based Argon ONE UP laptop with Ubuntu (version). I ran the official installer:

curl https://download.argon40.com/argononeup.sh | bash

Everything seems to work well except the F2/F3 screen brightness keys do not work. I see the installer gives these errors:

Updating configuration ...
Installing/Updating scripts and services ...
Initializing Services ...
Failed to connect to user scope bus via local transport: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)
Failed to connect to user scope bus via local transport: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)
Failed to connect to user scope bus via local transport: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)

It seems the brightness hotkey daemon did not start on Ubuntu.

Could you please advise:

  1. Is there an official method to enable the brightness keys on Ubuntu?

  2. Should a user-session service be running, or is there an alternative way to map F2/F3 for Linux users?

Thank you for your guidance — happy to provide any logs or outputs you need.

Best regards,
Ilkka

2

Try these lines before running the argon script

sudo usermod -aG input $USER

sudo usermod -aG i2c $USER

export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus

export XDG_RUNTIME_DIR=/run/user/$(id -u)

Somehow I managed to get it working on my Ubuntu instance. But am not sure what exactly I did to get it working. It works for me after logging in but not on the log in screen

3

Hi, thanks for the help. Now it is OK. Not sure if your tips or a system update helped.

It is a great laptop.

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