My suggestions were in a specific order for a reason: The combination of VirtualBox 6.1.x and the VirtualBox GA 5.2.44 (which you're still using) is supposed to just work well enough to update the GA (*), and not supposed to work with the VBoxSVGA graphics controller, which was firstly implemented in VirtualBox 6.0.x.fth0 wrote:I'd suggest to use the VirtualBox version 6.1.22 from Oracle, install the matching Virtualbox 6.1.22 Guest Additions and change Display > Screen > Graphics Controller to VBoxSVGA.
Even if your issues do not depend on the GA, IMHO it doesn't make much sense to investigate a (possibly invalid) setup that was only used by you and therefore is not comparable to well working setups of other users.Marco Sulla wrote:GA are irrelevant, since the slowdown is noticeable from the boot
Regarding the slowness: What exactly do you mean with "extremely slow", especially in the timeframe before the GA are running?
(*) FWIW, the reboots during the VM startup (mentioned by scottgus1) could very well be the result of the version mismatch.