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[Xen-devel] usb in hvm domU

  • To: "Xen devel list" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Henning Sprang" <henning_sprang@xxxxxx>
  • Date: Mon, 12 Feb 2007 02:16:49 +0100
  • Delivery-date: Sun, 11 Feb 2007 17:16:22 -0800
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

After asked on the users list first but getting no success or failure
report of anybody using this feature, I just tested the usb access in
hvm as documeted in

For me, this is quite broken: When I boot a VM with such a parameter,
it takes three times as long to boot, then, I can enter and lsusb
command, and see that the device seems to be there, but from then on,
the VM behaves very strange, not accepting keybord intput correctly
anymore, and I got now 3 times trapped in an vnc window, no way to
exit nicely, all I could do was going to the text console with
ctrl-alt-F1, login and kill vncviewer, then I could use x windows

Similar with SDL - when entering the window by clicking on it, I was
trapped in there, and the system kept booting as very slow as with
vnc. Again, no way to get out, but ctrl-alt-F1, ctrl-alt-F7.

At least for me, this feature does not work very well. It whould
probably be documented as "experimental" in the manual.

Besides that, I was wondering how I could add multiple device with
this configuration syntax. As there are mouse problems in hvm with vnc
graphics, which go away when using usbdevice="tablet",
how can I use for example an usb stick at the same time? I tried
usbdevice='tablet,host:vid:pid', but that doesn't work (with correct
vid and pid values - fir the tests above I used only these and they
lead to me seing the correct device in lsusb, but the problems
described above).
Didn't try yet to use a python list, currently fighting with the other


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