Ticket #3967 (closed defect: obsolete)

Opened 9 years ago

Last modified 3 years ago

VBoxSVC.exe 100% CPU utilization with USB audio

Reported by: ndousis Owned by:
Priority: major Component: other
Version: VirtualBox 2.2.2 Keywords: VBoxSVC.exe, USB audio, 100%
Cc: Guest type: Windows
Host type: Windows

Description (last modified by frank) (diff)


In VirtualBox 2.1 and 2.2, VBoxSVC.exe uses 100% of 1 CPU core. I'm also using an external USB audio controller, which seems to be correlated with my problem. I read here ( that 100% CPU utilization may result when another program using sound is running when a VM is started.


  • Intel Core 2 Duo
  • VirtualBox 2.2.2 r46594 win.amd64
  • host: Windows Vista 64-bit Home Premium SP1
  • guests:
    • 32-bit Windows XP Pro SP3
    • 32-bit Ubuntu 8.10
  • C-Media CM106 USB 3D audio controller (Toshiba Dynadock)

Matrix of scenarios that I've tested:

scenarioguest VMUSB audioVBoxSVC.exe
1on (WinXP or Ubuntu)on100% CPU
2on (WinXP or Ubuntu)offnormal
3offon or offnormal

A typical scenario is the following: USB audio is active; I start VirtualBox and power on my virtual machine (WinXP), and VBoxSVC.exe is running normally. As soon as I open the Zune player or go to, VBoxSVC.exe starts using a full CPU core, and will not stop, even after I exit my music player.

I'm using a Toshiba Dynadock docking adapter which has the USB audio chip. It seems that this VBoxSVC.exe issue disappears when my PC is not docked to the Dynadock.


euclid-WinXP-2009-05-08-12-44-26.log Download (39.5 KB) - added by ndousis 9 years ago.

Change History

Changed 9 years ago by ndousis

comment:1 Changed 3 years ago by frank

  • Status changed from new to closed
  • Resolution set to obsolete
  • Description modified (diff)
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