Comment 3 for bug 1721544

Thank you!
In "Terminal", I entered the following.
$ xhost +si:localuser:root
$ synaptic-pkexec

"Synaptic" has started.

2017-10-05 22:47 GMT+09:00 dino99 <email address hidden>:

> *** This bug is a duplicate of bug 1712089 ***
> https://bugs.launchpad.net/bugs/1712089
>
> ** This bug has been marked a duplicate of bug 1712089
> Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect:
> Connection refused
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1721544
>
> Title:
> I installed "Synaptic Package Manager", but I can not start it.
>
> Status in synaptic package in Ubuntu:
> Incomplete
>
> Bug description:
> I installed "Synaptic Package Manager", but I can not start it.
> (Japanese environment)
>
> Steps to reproduce
> ---
> 1. In "Software", search "Synaptic Package Manager" and install it.
> 2. Click "Show Application" at the bottom of the launcher. Start
> "Synaptic Package Manager".
> 3. Enter the password.
> When it is normal, "Synaptic Package Manager" starts, but it does not
> start. Nothing happens.
>
> ---
> 1. I clicked "Show application" at the bottom of the launcher.
> "Terminal" started up.
> 2. In "Terminal", I entered "sudo synaptic".
> 3. I entered my password. The following error occurs and does not start.
>
> No protocol specified
> Unable to init server: Could not connect: 接続を拒否されました
> (synaptic:9923): Gtk-WARNING **: cannot open display: :0
>
> →"No protocol specified
> Unable to init server: Could not connect: Connection refused
> (synaptic:9923): Gtk-WARNING **: cannot open display: :0 "
>
> ---
> Ubuntu 17.10 (Beta 2)
> GNOME 3.26.1
> Synaptic Package Manager: 0.84.2
>
> ProblemType: Bug
> DistroRelease: Ubuntu 17.10
> Package: synaptic 0.84.2
> ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
> Uname: Linux 4.13.0-12-generic x86_64
> ApportVersion: 2.20.7-0ubuntu2
> Architecture: amd64
> CurrentDesktop: ubuntu:GNOME
> Date: Thu Oct 5 22:19:20 2017
> InstallationDate: Installed on 2017-10-03 (2 days ago)
> InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64
> (20170926)
> SourcePackage: synaptic
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/synaptic/+bug/
> 1721544/+subscriptions
>