New comment by deepaknegilachu on void-packages repository

https://github.com/void-linux/void-packages/issues/30342#issuecomment-823738672

Comment:
 yes am on video group
sorry i didn,t check brillo man but i got a runit service for that from someone github it save brightness at var and restore at boot 

yes i use mate-polkit and its working with 
"if which dbus-launch >/dev/null && test -z "$DBUS_SESSION_BUS_ADDRESS";
then
	eval "$(dbus-launch --sh-syntax --exit-with-session)"
fi"

if i put this line in .xinitrc for startx or /etc/lightdm/xsession file for lightdm

without above line am not able to mount usb and andriod device in pcmanfm 

i think polkit agent depend upon dbus also

thanks for taking time !