id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
9097	Ubuntu hangs in VB 4.0.8 when CPU > 1	Radek Antoniuk		"The problem is very widely described [http://forums.virtualbox.org/viewtopic.php?f=6&t=36426 here].

VM guest of Ubuntu (fully upgraded), running GNome, is randomly hanging.
At the very beginning, it looks like a ""silly window syndrome"". I am able to switch between windows, but I when I try to close any applications, I think they are closed, but the screen GUI stays there.
Reboot is impossible (I mean via Ubuntu options, ctrl+r works fine).

The problem appears when I set CPU cores to >1.
My host machine is running Win7 64-bit, Intel Core I5, M480, 2.67GHz, 6.00 GB RAM.
The guest system is 32-bit ubuntu, 2GB RAM, guest tools installed.

"	defect	closed	other	VirtualBox 4.0.8	fixed			Linux	Windows