Here is the output here: loged with gdm (as lightdm fails) & 'nouveau' used
oem@u32:~$ loginctl show-seat seat0 Id=seat0 ActiveSession=c2 CanMultiSession=yes CanTTY=yes CanGraphical=no Sessions=c2 c1 IdleHint=no IdleSinceHint=0 IdleSinceHintMonotonic=0
Here is the output here: loged with gdm (as lightdm fails) & 'nouveau' used
oem@u32:~$ loginctl show-seat seat0 notonic= 0
Id=seat0
ActiveSession=c2
CanMultiSession=yes
CanTTY=yes
CanGraphical=no
Sessions=c2 c1
IdleHint=no
IdleSinceHint=0
IdleSinceHintMo