App title bar says "as superuser", but that's not the case

[lesliek]

I installed GIMP via flatpak. When I open GIMP, what I say in the summary above happens. I raised the problem on a GIMP users list. I was told that the same thing does NOT happen when GIMP is installed via flatpak in Fedora. The person who gave me that information also reported a bug to flatpak based on what I'd said, but flatpak closed the bug, claiming that the error isn't a flatpak error, but a Ubuntu error. Hence this report.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-flashback 3.18.2-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-119.143-generic 4.4.114
Uname: Linux 4.4.0-119-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: GNOME-Flashback:Unity
Date: Fri Apr 6 16:35:26 2018
InstallationDate: Installed on 2016-07-28 (617 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: gnome-flashback
UpgradeStatus: No upgrade log present (probably fresh install)

[Dmitry Shachnev (mitya57)]

The window title is handled by Metacity, so reassigning.

[Marnanel Thurman (marnanel)]

We add "(as superuser)" if the process which owns the window claims to be owned by user 0, i.e. root.

Please reproduce the problem, then do

$ xprop|grep _NET_WM_PID

and click on the window with the problem. xprop will say something like

_NET_WM_PID(CARDINAL) = 1586

And then do

marnanel@grantham:~$ ps aunx|grep 1586

(with 1586 replaced by whatever xprop told you). This should say something like

1000 1586 0.0 1.2 188156 52000 ? Ssl Mar22 11:41 /usr/lib/gnome-terminal/gnome-terminal-server

and then tell us what it says.