/etc/X11/gdm/Xsession: Beginning session setup…
/etc/X11/gdm/Xsession: Setup done, will execute: /usr/bin/ssh-agent -- /etc/X11/xdm/Xsession Fluxbox
libGL warning: 3D driver claims to not support visual 0x54
Failed to open the VirtualBox device in the guest.
Failed to connect to the host clipboard.
Failed to read: session.ignoreBorder
Setting default value
Failed to read: session.forcePseudoTransparency
Setting default value
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BScreen::BScreen: an error occurred while querying the X server.
Another window manager already running on display :0.0
Error: Couldn’t find screens to manage.
Make sure you don’t have another window manager running.