VirtualBox on ubuntu 8.10 host, can't get USB working in Windows XP guest, not permissions

NoOp glgxg at
Fri Nov 28 19:05:11 UTC 2008

On 11/28/2008 09:47 AM, Chris G wrote:
> On Fri, Nov 28, 2008 at 09:26:24AM -0800, NoOp wrote:
>> Post these:
>> 1. This line from your /etc/fstab:
>> none  /proc/bus/usb   usbfs devgid=<number>,devmode=664      0  0
>> 2. Your group list:
>> group <yourusername>
> The /etc/fstabl line is:-
>     none                /proc/bus/usb   usbfs   devgid=123,devmode=666 0 0

Change to 664 v 666.

> I don't have a 'group' command, I guess you meant 'groups' :-

Yes. Sorry.

>     chris adm dialout cdrom plugdev lpadmin admin sambashare vboxusers

That looks ok to me.

> ... and 'grep vboxusers /etc/group' produces:-
>     vboxusers:x:123:chris,root

I'd caution against root being in vboxusers given that you're running a
MS$ guest.

Also, not sure which version of VirtualBox you are running, but you
might want to update to the latest if you are not there already:
I've updated to 2.0.6 (and of course updated the VboxGuestAdditions to
same) and so far it's been working very well.

Note: I only have it on hardy as the only intrepid machine I have is an
old slow Thinkpad A21M with limited hard drive space. But, the faq also

If you want to make all USB devices available for users member of the
vboxusers group, apply the proposed change for USB on openSUSE.

and that has some additional items in the fstab line:
none  /proc/bus/usb  usbfs
auto,busgid=XXX,busmode=0775,devgid=XXX,devmode=0664  0  0
I'm not sure if the busgid & busmode is applicable to intrepid, but you
can try it. I'd just try 664 first to see if that will resolve the problem'

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