Comment # 11 on bug 1172924 from Freek de Kruijf

(In reply to Franck Bui from comment #10)
> (In reply to Freek de Kruijf from comment #7)
> > CanGraphical=no
> 
> It seems that no "master" device has been detected on your platform.
> 
> At least one device needs to be tagged with "master-of-seat", see
> https://www.freedesktop.org/software/systemd/man/sd-login.html for some
> details.
> 
> And it's done by udev rules in /usr/lib/udev/rules.d/71-seat.rules.
> 
> So what is your video card on your system ?

It is a Raspberry Pi4, so not much choice in video cards.

> Can you please attach the output of "udevadm info -e" ?

see attachment.
> 
> Thanks.