[Xen-bugs] [Bug 906] New: USB port forwarding to hvm domU causing bad behaviour

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=906

           Summary: USB port forwarding to hvm domU causing bad behaviour
           Product: Xen
           Version: 3.0 (general)
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: henning_sprang@xxxxxx


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
http://www.cl.cam.ac.uk/research/srg/netos/xen/readmes/user/user.html#SECTION04344000000000000000

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, being very slow, much slower even than with qemu, 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
again.

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 should
probably be documented as "experimental" in the manual.


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