Bug 1385556

yeah .. this one wayland/sudo issue tracked under bug#1274451.

Just to be sure though - can you see if you can launch gparted from X11 session instead of wayland?

This is must likely a duplicate of 1274451

This isn't exact the same issue as bug#1274451.
bug#1274451 describe it as sudo/wayland issue. So apps with this issue doesn't start with sudo command. But they will start as root user (used with su command).

gparted doesn't start neither with sudo nor su command.
gparted  works fine with X-Org server.

I see now 2 possibilities:

1. In Fedora24 is in the wayland session no XWayland-layer(?) or so implemented -> there will be no bug fix needed, because the further development will be realized in Fedora 25.

2. In gparted is an old(?) gtk-function used, that is incapable to redirect to wayland calls and it will fail. But other gtk-apps doesn't have this problem, so I think they use other gtk-functions, that automatically redirect to wayland calls. -> Here is the possibility to change in gparted the gtk-functions. (Maybe I'm to naive and I'm wrong :-)

Despite what Rolle says, this bug is a duplicate of bug 1274451.
My standard text follows ...

This is caused by Wayland not allowing processes run as a different user
to display on the desktop.  Therefore using "su" or "sudo" to display a
graphical application doesn't work.

Simple workaround is to run "xhost +local:" in the terminal first.

This is documented in the GParted forum here:
  [SOLVED] How to run GParted on a GNOME on Wayland desktop
  http://gparted-forum.surf4.info/viewtopic.php?id=17446

This bug should be closed as a duplicate of bug 1274451.
(But I don't have permission to do that).

Thanks,
Mike Fleetwood (GParted Developer)

To counter Rolle's 2nd possibility.  Try to run up to date
gnome-system-monitor 3.20 on GNOME 3.20 desktop on Fedora 24, after
suing to root.  Result is gnome-system-monitor fails to connect to the
display exactly as GParted does.

[fedora@fedora24 ~]$ rpm -q gnome-system-monitor
gnome-system-monitor-3.20.1-1.fc24.x86_64
[fedora@fedora24 ~]$ env | grep DISPLAY
WAYLAND_DISPLAY=wayland-0
DISPLAY=:0
[fedora@fedora24 ~]$ su -
Password: 
[root@fedora24 ~]# env | grep DISPLAY
[root@fedora24 ~]# export WAYLAND_DISPLAY=wayland-0
[root@fedora24 ~]# env | grep DISPLAY
WAYLAND_DISPLAY=wayland-0
[root@fedora24 ~]# gnome-system-monitor 
Unable to init server: Could not connect: Connection refused

(gnome-system-monitor:2769): Gtk-WARNING **: cannot open display: 
[root@fedora24 ~]# export DISPLAY=:0
[root@fedora24 ~]# env | grep DISPLAY
WAYLAND_DISPLAY=wayland-0
DISPLAY=:0
[root@fedora24 ~]# gnome-system-monitor 
No protocol specified
Unable to init server: Could not connect: Connection refused

(gnome-system-monitor:2773): Gtk-WARNING **: cannot open display: :0

Closing as duplicate as pointed out by Mike.

*** This bug has been marked as a duplicate of bug 1274451 ***

So, the bug 1274451 was closed as WONTFIX, and the resolution is that from now on GUI application shouldn't be run with root privileges, and all the privileged operation should be handled using polkit (I actually have no idea what does it mean, see comment 33 in that bug for details).

And since gparted is a GUI that has no meaning without root access, I'd say this warrants for a bug re-open.

Any news here? I experience the same issue.

(In reply to rugk from comment #7)
> Any news here? I experience the same issue.

I don't think there is any change. The way to launch graphical applications in wayland as root is described here - http://gparted-forum.surf4.info/viewtopic.php?id=17446

But there should not be software installable, which just does not work in a default installation when starting it.