Krfb shows an error message when activated.

[Diaa Sami]

Fresh Kubuntu 15.04 install, krfb outputs the following message when checking the "Enable Desktop Sharing" checkbox.

Installed Version: 4:14.12.3-0ubuntu1

I tried opening the same port using nc and it worked normallyl, and nmap reported that the port is open.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Wed May 6 23:47:50 2015
InstallationDate: Installed on 2015-04-28 (8 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[ronny (ronny-standtke)]

I can confirm the issue. Whenever I try to enable desktop sharing I get the following error message:
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Failed to start the krfb server. Desktop sharing will not work. Try setting another port in the settings and restart krfb.
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Whatever port I choose, krfb fails to start desktop sharing.