This a well known wayland limitation.
The workaround (till the pkexec -> policykit transition is made) is to use
xhost script.
Gparted already has an opened bug:
https://bugs.launchpad.net/ubuntu/+source/gparted/+bug/1652282
and policykit has to be used, but is not directly concerned as a bug.
** Changed in: gparted (Ubuntu)
Status: New => Invalid
** Changed in: policykit-1 (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1713313
Title:
Unable to launch backintime and gparted as root on Wayland session
Status in backintime package in Ubuntu:
New
Status in gparted package in Ubuntu:
Invalid
Status in policykit-1 package in Ubuntu:
Invalid
Bug description:
Steps to reproduce:
1. Install Ubuntu 17.10
2. Install backintime-qt4 or gparted
3a. Try to launch backintime-qt4 from shortcut "Back In Time (root)" (located
in /usr/share/applications/backintime-qt4-root.desktop, it uses pkexec
($ cat /usr/share/applications/backintime-qt4-root.desktop | grep Exec
Exec=pkexec backintime-qt4)
3b. Try to launch Gparted from shortcut "GParted" (located in
/usr/share/applications/gparted.desktop, it uses gparted-pkexec)
4a.1. Back In Time does not start from GUI.
4a.2. Back In Time shows error message in console:
4b. gparted-pkexec does not start, reports error
$ gparted-pkexec
Created symlink /run/systemd/system/-.mount → /dev/null.
Created symlink /run/systemd/system/run-user-1000.mount → /dev/null.
Created symlink /run/systemd/system/run-user-121.mount → /dev/null.
Created symlink /run/systemd/system/tmp.mount → /dev/null.
No protocol specified
(gpartedbin:12831): Gtk-WARNING **: cannot open display: :0
Removed /run/systemd/system/-.mount.
Removed /run/systemd/system/run-user-1000.mount.
Removed /run/systemd/system/run-user-121.mount.
Removed /run/systemd/system/tmp.mount.
$ pkexec backintime-qt4
Back In Time
Version: 1.1.12
Back In Time comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type `backintime --license' for details.
No protocol specified
app.py: cannot connect to X server :0
Expected results:
* backintime-qt4 may be run as root
Actual results:
* unable to run backintime-qt4 as root
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: backintime-qt4 1.1.12-2
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic i686
ApportVersion: 2.20.6-0ubuntu7
Architecture: i386
CurrentDesktop: GNOME
Date: Sun Aug 27 14:23:14 2017
InstallationDate: Installed on 2017-08-26 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha i386 (20170826)
PackageArchitecture: all
SourcePackage: backintime
UpgradeStatus: No upgrade log present (probably fresh install)
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