Apps for x11 with root privileges (Synaptic, GParted..)

[jeremie2]

Can't run apps for x11 like Synaptic and GParted that require root privileges.
Error message:

Authorization required, but no authorization protocol specified

..unless using old workarounds used when Wayland was first introduced:

Synaptic:

1. Run in the terminal:

   xhost +si:localuser:root && synaptic-pkexec ; xhost -si:localuser:root
   

GParted:

1. In the current terminal session run:

   xhost +SI:localuser:root
   

2. Then run:

   gparted
   

Not really expert but those issues are probably due to the use of a new compositor and maybe a fix will at some point arrive. In the meantime I've just in case opened this issue.