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Re: Starting VirtualBox 5 GUI creates two windows, but only with Cygwin/X

On 27/03/2016 19:34, Basin Ilya wrote:
I often use X11 forwarding to run Linux programs with GUI.
Recently I upgraded from vbox 4 to version
(My Linux host is headless Rhel 6.7 Server with xorg-x11-xauth package

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@hostname"
and the hidden one is captioned "VirtualBox@hostname"

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

Thanks for reporting this.

I tried to reproduce this issue with that VirtualBox RPM on a Centos 6.7 VM, without success.

It's not unusual for X clients to create 1x1 pixel windows which only exist to receive events, but such windows are usually hidden by making them InputOnly.

You could possibly explore this a bit using xwininfo, to determine if this is a bug with VirtualBox (where the window isn't being correctly marked as hidden) or XWin (where the window is being show, desipte the fact it should be hidden)

Volunteer Cygwin/X X Server maintainer

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