[Bug 258771] Re: Using -usbdevice host: slows the guest OS down to a crawl

Dustin Kirkland dustin.kirkland at gmail.com
Fri Sep 11 23:16:27 BST 2009

Some USB devices have higher polling frequencies than others.  An
abnormally high polling frequency could easily cause a guest to crawl to
a halt.  Also, it could be that your device is a USB 2.0 device that is
falling back to USB 1.1 in the guest, which could also slow things down
considerably.  Otherwise, this could be an issue in the kernel's USB
code.  None of these are solutions to the bug, but I'm trying to capture
a few ideas...


** Changed in: kvm (Ubuntu)
       Status: Incomplete => Won't Fix

** Changed in: qemu (Ubuntu)
       Status: New => Won't Fix

** Also affects: qemu-kvm (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: qemu-kvm (Ubuntu)
       Status: New => Incomplete

** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => Low

Using -usbdevice host: slows the guest OS down to a crawl
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