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Date: Sun, 27 Mar 2016 21:34:13 +0300
From: Basin Ilya <basinilya AT gmail DOT com>
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To: cygwin AT cygwin DOT com
Subject: Starting VirtualBox 5 GUI creates two windows, but only with Cygwin/X
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Hi list.

I often use X11 forwarding to run Linux programs with GUI.
Recently I upgraded from vbox 4 to version
VirtualBox-5.0-5.0.16_105871_el6-1.x86_64.
(My Linux host is headless Rhel 6.7 Server with xorg-x11-xauth package
installed)

I noticed that when I type "VirtualBox" in shell and then close its
window the process remains running. Then I noticed that there's another
hidden window in taskbar.
I have to press Ctrl-C or close the second window to end the process.

This only happens when I connect from Windows and use cygwin xwin server
(but not xming or Linux client)

The visible window is captioned "Oracle VM VirtualBox Manager AT hostname"
and the hidden one is captioned "VirtualBox AT hostname"

It's not really hidden. There's a white pixel at the top-left edge of my
second monitor

I upgraded my Cygwin installation today, but the problem did't go away.
Before the upgrade I had some messages appear in XWin.0.log, but now
they're gone:

    [656077.648] winMultiWindowXMsgProcErrorHandler - ERROR: BadWindow
(invalid Window parameter)
    [656077.664] winMultiWindowXMsgProcErrorHandler - ERROR: BadWindow
(invalid Window parameter)
    [656077.664] winMultiWindowXMsgProcErrorHandler - ERROR: BadWindow
(invalid Window parameter)

I start the server from shell using an alias:

	alias runx='run xwin -multiwindow -noprimary'

I have this at the end of my ~/.ssh/config:

Host *
    ForwardX11Trusted yes
    ForwardX11 yes


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