[Bug 455112] [NEW] VirtualBox performance is much worse when Intel VT-x is enabled

[Michał Gołębiowski]

Public bug reported:

Binary package hint: virtualbox-ose

I have Dell Latitude E6500 with P8600 CPU. When I run my Windows XP
guest on VirtualBox OSE without virtualization VT-x option inactive it
runs much faster than in the case I turn it on. It is really visible -
with VT-x on I even see how screen flickers during the boot process.

I did Peacekeeper tests in Firefox and I got these results:
1) VT-x off, 3D support off - 1596
2) VT-x off, 3D support on - 1679
3) VT-x on, 3D support off - 900
4) VT-x on, 3D support on - 1314

Google Chrome behaves even more strange - with VT-x off it runs faster
than Firefox while with VT-x on it runs *VERY* slow but looses no frames
in graphic tests and it finally gets sth like 8800 points.

ProblemType: Bug
Architecture: amd64
CheckboxSubmission: b35340b6290029563207fd4b2aa461a1
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Mon Oct 19 04:44:51 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Alpha amd64 (20091008)
Package: virtualbox-ose-qt 3.0.8-dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: virtualbox-ose
Uname: Linux 2.6.31-14-generic x86_64
VirtualBoxOse.DpkgList:
 ii  virtualbox-guest-additions                          3.0.6-1                                    guest additions iso image for VirtualBox
 ii  virtualbox-ose                                      3.0.8-dfsg-1ubuntu1                        x86 virtualization solution - base binaries
 ii  virtualbox-ose-qt                                   3.0.8-dfsg-1ubuntu1                        x86 virtualization solution - Qt based user 
 ii  virtualbox-ose-source                               3.0.8-dfsg-1ubuntu1                        x86 virtualization solution - kernel module

** Affects: virtualbox-ose (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
VirtualBox performance is much worse when Intel VT-x is enabled
https://bugs.launchpad.net/bugs/455112
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