Public bug reported:
This concerns virtualbox-guest-x11 6.1.32-dfsg-1build1 in Ubuntu jammy.
I am running the Xubuntu (Xfce) desktop inside of a VirtualBox host
(5.2.42-dfsg-0~ubuntu1.18.04.1) on Ubuntu bionic.
The system boots fine, and I get to the lightdm login prompt without
issue. Shortly after logging in, however, the entire (guest) screen
turns black.
The desktop appears to be running normally, I can start X applications
from a virtual terminal, I can even confirm with xev(1) that mouse
movements are being recognized within the black screen. However, nothing
I do gets anything to display, other than killing the session from a VT
and returning to lightdm.
I have tracked down the issue to the invocation of "/usr/bin/VBoxClient
--vmsvga" in /etc/X11/Xsession.d/98vboxadd-xclient . If I comment out
that line, then the session appears normally. If I re-enable it, the
black screen returns. Heck, if I run that in a terminal in a working
session, the black screen returns. Killing the VBoxClient process at
fault does not restore normal video.
** Affects: virtualbox (Ubuntu)
Importance: Undecided
Status: New
** Tags: jammy
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https://bugs.launchpad.net/bugs/1973302
Title:
"/usr/bin/VBoxClient --vmsvga" causes black screen inside VirtualBox
host
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