Hi,
I did not find any thread about that ?
Well, I connect a monitor as a 2nd display to my laptop. When I try to launch a snap, I get:
Gtk cannot open display: :0
Tested with foliate or snap-store.
Sweet-home-3d is ok, though.
$ snap --version
snap 2.44.3+20.04
snapd 2.44.3+20.04
series 16
ubuntu 20.04
kernel 5.4.0-31-generic
$ snap list
Nom Version Révision Suivi Éditeur Notes
core18 20200427 1754 latest/stable canonical✓ base
core20 20 634 latest/stable canonical✓ base
foliate 2.1.1 142 latest/stable johnfactotum -
gnome-3-28-1804 3.28.0-16-g27c9498.27c9498 116 latest/stable canonical✓ -
gnome-3-34-1804 0+git.3009fc7 33 latest/stable canonical✓ -
gtk-common-themes 0.1-36-gc75f853 1506 latest/stable canonical✓ -
snap-store 3.36.0-78-ge29ea9a 445 latest/beta canonical✓ -
snapd 2.44.3 7264 latest/stable canonical✓ snapd
sweethome3d-homedesign 6.2 9 latest/stable jibel -