I just installed the latest Endeavour OS on a machine and also installed the latest Virtualbox - which is 7.0. Everything seems to be fine and configured correctly.
Then I started a virtual machine created earlier in Virtualbox 6. The screen keeps black for a long while. Then I uninstalled guest additions, rebooted and installed new guest additions 7.0. After reboot I have the same issue:
VM screen keeps black for a long while
after screen appears, resizing not working
VM machine is very slow
Without guest additions VM runs normal, but without the integrations, resizing …
[mfr@maago-tux-endeavour ~]$ sudo pacman -Qs virtualbox
local/linux 6.0.7.arch1-1
The Linux kernel and modules
local/virtualbox 7.0.2-2
Powerful x86 virtualization for enterprise as well as home use
local/virtualbox-ext-oracle 7.0.2-1
Oracle VM VirtualBox Extension Pack
local/virtualbox-guest-iso 7.0.2-1
The official VirtualBox Guest Additions ISO image
local/virtualbox-guest-utils 7.0.2-2
VirtualBox Guest userspace utilities
local/virtualbox-host-dkms 7.0.2-2
VirtualBox Host kernel modules sources
The guest is a Windows 11 with installed 7.0.2 guest
My Win 10 VirtualBox 6 installation also went black after the windows login in VirtualBox 7. What fixed it was unchecking Enable 3D Acceleration in the Display Settings for that VM.