id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
10451	Machine becomes very slow after virtualbox upgrade	Merrilin		"I recently upgraded a virtualbox that was running a version 3.x (sorry, I did not keep the old version number). The Gentoo 32 bit guest OS was running fine until now, but became unusably slow after the upgrade.

I noticed that deactivating the settings ""VT-x/AMD-V"" makes the machine halfway usable (with a 3x to 4x slowdown compared to before). With that option on (with or without ""nested paging""), the slowdown is definetely higher than 10 and does not allow to do much with the VM.

I have tried numerous versions of Virtualbox 4, and am currently with 4.1.8. None of those I tried did behave better.

I also tried to destroy the VM and recreate it with the same .vdi file, with no success."	defect	closed	other	VirtualBox 4.1.8	worksforme	very slow VM		other	other