id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
7258	Host freeze if intel VT is enabled (Gigabyte)	woec		"When resuming after having suspended (S3)  and starting a VM with vt-x enabled, the host freezes. The VM runs without problems when starting it from host which was not ever suspended before since last boot.
Seems to be same isssue as reported in #5048 and #7216.

Following new aspect:
reading out the corresponding Machine register, which controls the VT-x function - IA32_Feature_Control (MSR 0x0000003a, Bits [2:0]) using the msr-tools (rdmsr), I got a value of 5 - which means VT-x is enabled. Result is 5, independently on machine history (S3 before or new booted machine). I found also that this register is write protected, I was not able to change its value by means of wrmsr. So I conclude, VT-x is enabled from the BIOS and it does not change its state while suspend and resume.

I am also quite sure, that the problem described here was not there on older versions of virtualbox under same machine configuration (maybe before 3.0.10).

My machine configuration: CPU: Intel E8400, Mobo: Gigabyte GA-EP35-DS3, 4 GB RAM, Debian Linux squeeze, kernel 2.6.32-5-686-bigmem"	enhancement	closed	VMM/HWACCM	VirtualBox 3.2.6	duplicate	VT-x, host freeze after S3		Windows	Linux