Virtual box USB problems

[Derek Broughton]

Mumia W. wrote:

> On 09/23/2008 12:08 PM, Derek Broughton wrote:
>> Mr Shunz wrote:
>> 
>>>> Specifically, your /proc/bus/usb/* needs to be writable by the
>>>> vboxusers group - it isn't in Ubuntu, and even with the help of the
>>>> virtualbox community I haven't been able to figure out the correct udev
>>>> rules to make it boot that way.
>>> this worked for me (Ubuntu 8.04):
>>>
>>> open /etc/init.d/mountdevsubfs.sh
>>>
>>> go to the section that says:
>>>
>>> #
>>> # Magic to make /proc/bus/usb work
>>> #
>>>
>>> uncomment the lines that follow ...
>>>
>>> obviusly, add yourself to vboxusers group...
>> 
>> Yeah, that's the method I've used but it's _wrong_.  As opposed to just
>> chmod'ing the nodes, it _will_ work at next boot, but it breaks again the
>> next time your "initscripts" package is upgraded (because
>> mountdevsubfs.sh is part of that package, and Ubuntu's version will
>> overwrite it - and if you're remotely like me, you've forgotten what to
>> do to fix the problem by the time that happens).
>> 
>> So I've found two options that work by modifying udev - which I can set
>> up to always work ahead of anything installed by Ubuntu - but neither of
>> those, or my attempt at modification, is actually working :-(
> 
> Can't you place a command to set the desired ownership into
> /etc/init.d/rc.local?

Well, not if the bit of the manual that NoOp quoted to the effect that you
can't chmod a virtual filesystem is true.  I don't actually think it is...
-- 
derek