Virtualbox issue after recent stable-update (Manjaro Host and Guest - both Plasma/KDE)

After the update, the VM was just automatically being “paused”, when I tried to boot it.
No password-prompt for the encrypted VM. Just kept hanging in “paused”-state. When “unpausing” the VM, the cursor started blinking again … but nothing else would happen.

Then, I did:
pacman -Rc virtualbox virtualbox-dkms
pacman -Scc
pacman -Syyuu
pacman -S virtualbox virtualbox-dkms

And then installed the current Extension-package from here:
https://www.virtualbox.org/wiki/Downloads

After that, the VM booted again. Everything seemed to run fine, but I noticed glitches, here and there (e.g. when hovering on any random element of a website, a purple rectangle would appear and almost instantly disappear again … or rectangles, that showed content from other tabs, etc … in short: gfx-glitches).

Especially when playing a video on youtube (inside the VM) … and then suddenly the image froze and I could do nothing anymore (no hotkeys … no mouse-clicks … sometimes, I’d be able to see the scrollbars highlight, when I hovered over them with my mouse-pointer, but that would be all).

I’ve had 3D-acceleration enabled (in the virtualbox-settings for the VM) and it crashed over and over again. Now, I’ve disabled 3D-acceleration and it still crashes.

I haven’t even touched Firefox or youtube (was using Brave on reddit, when it recently happened again … twice in a row, when I was just typing a post … nothing, that would put any strain on my graphics-card).

So, I don’t know, if it has anything to do with the browsers, I use … or the websites, I’m trying to use … or if it’s just gonna keep happening, randomly, no matter what I do …

Before the update, I had zero problems, with that VM.

If you need more data to help, just ask … I’ll try to make it as easy as possible.

Is this a bug or can I fix this myself, somehow?

I don’t think it is a bug - but then - I am no longer using Nvidia but either AMD or Intel graphics and I am not using the saved state feature much - if at all.

I have had no issues in the transistion from VBox 6 to VBox 7 - I migth just have that system which steers clear of all the issues I read about.

First thing to do is to ensure both systems uses all defaults, are fully synced with no custom packages and no custom repo. This is probably far tetched - make sure both systems uses the same mirror.

Start with the host - as a precaution reboot the host afterwards - (if nothing is updated - skip the reboot)

sudo pacman -Syu

If you are using the Oracle extension pack - disable your virtual machines dependency on the extensions and remove it.

As I recall - VBoxVGA and VBoxSVGA is for Windows VMs - so set it to VMSVGA and disable 3D - you can reenable 3D later as part of the troubleshooting process.

But you may want to ensure enough VRAM has been assigned - move the slider to 128MB.

Start the virtual machine - if it starts from a saved state - reboot it - and issue the same sync command as the host.