[Xfce-bugs] [Bug 9916] New: Running xfce4 under vnc xfce4-session report "Another session manager is already running"

[bugzilla-daemon at xfce.org]

https://bugzilla.xfce.org/show_bug.cgi?id=9916

            Bug ID: 9916
           Summary: Running xfce4 under vnc xfce4-session report "Another
                    session manager is already running"
    Classification: Xfce
           Product: Xfce4-session
           Version: 4.8.0
          Hardware: PC (x86_64)
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Medium
         Component: General
          Assignee: xfce-bugs at xfce.org
          Reporter: narrenschip1 at operamail.com
        QA Contact: bjt23 at cornell.edu
                CC: benny at xfce.org, nick at xfce.org

xfce4-session reports "Another session manager is already running"
when trying to start an xfce4 desktop inside a VNC session and another xfce4
desktop is running on the console.

Very crude workaround: Start the VCN/xfce4 session in a text console before
starting a xfce4 session on the main console.

I found this when googling around for a solution:
"commit b0eec65b45fe4417351ca86f85095232df6d2f95
Author: Benedikt Meurer <benny at xfce.org>
Date:   Thu Dec 11 17:09:25 2003 +0000

    Added check to see if another session is already running."

Steps to reproduce:
  1) log into an xfce4 on the main console
  2a) start a VNC desktop with 'startxfce4' in the ~/.vnc/xstartup
  3a) Log into VNC, admire the blank screen and notice the error message in the
VNC log file.
or
  2b) start a VNC session with only an xterm in the xstartup file (no window
manager, or anything else)
  3b) try to start a xfce4 desktop with startxfce4 or xfce4-session

Actual result:
 error message in the VNC log file or in the xterm:
 "Another session manager is already running"

Expected results:
 A running xfce desktop session

Platform:
 Debian Wheezy

This bug has also been reported in XFCE4.6: Bug 7502

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