Comment 0 for bug 1721544

I installed "Synaptic Package Manager", but I can not start it. (Japanese environment)

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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.

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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 "

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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)