[ubuntu-uk] usb devices and ubuntu 10.04

[Jacob Mansfield]

sounds like a power problem to me, is it a powered usb hub (with a
plug/adapter/transformer)

On 29 September 2010 20:54, Glen Mehn <glen.mehn at oba.co.uk> wrote:

>  Hi Paul,
>
> I've had no problems with this from, broadly, 7.x to 10.04/10.10.
>
> /media should be dynamically creating folder names to mount things.
>
>  From what I can tell, you have several problems of problems:
>
> 1 - the Sansa MP3 player sometimes mounts and sometimes randomly unmounts
> 2 - the USB hard drive mounts when plugged in directly, but not via the hub
> 3 - you can only access one USB drive through the hub
>
> Is that correct?
>
> The behaviour you're describing sounds rather a lot like something I
> have experienced: a dodgy USB cable and/or connection-- you might check
> the cable, the socket on the hub, and the socket on the mp3 player.
>
> Once you've cleared cables, try this:
>
> What is the output of "lsusb" with:
> - evertything unplugged
> - the hub only plugged in (no devices attached to it)
> - the hub plugged in with 1, then 2 devices attached to it.
>
> That'll let you know waht the USB bus is seeing. You might also google
> the model number of your hub and "linux" or "ubuntu" to see if other
> folks are experiencing the same issue. I would suspect that the system
> isn't seeing the hub as a hub, so only able to attach one device on to it.
>
> Hope this helps.
>
> Glen
>
> On 29/09/10 20:05, Paul Sutton wrote:
> > Hi
> >
> > using ubuntu 10,04 I am trying to copy data to a sansa clip usb mp3
> player
> >
> > if I plug it in as me, then it sometimes mounts and I can view the data
> > on it, however it does not always mount properly or seems to randomly
> > disconnect and the icon is removed from the desktop
> >
> > my user is a admin user on ubuntu,
> >
> > if i try and plug it in as a normal user nothing seems to happen at all
> > with the music device, the external hard disk seems well behaved for the
> > most part.
> >
> > i also have a usb hard disk which if plugged in to the desktop system,
> > directly mounts,  if I try and plug this in to the usb external hub it
> > won't mount,
> >
> > if I try and plug both devices in to the external hub i get either one
> > or the other mounting,  but not both if they are both plugged in
> >
> > are there issues with dbus that can cause problems
> >
> > what has changed in terms of the content of /media it used to have
> > folders which I now understand are dynamically created.
> >
> > before we had folders that acted as mount points,  something has changed
> > between 10.04 and earlier versions in the way ubuntu handles things I am
> > getting lots of messages referring to dbus,  so not sure if there are
> > know bugs in that.
> >
> > I am really really struggling to explain exactly what the situation is
> > as to me it seems random,  sometimes I can plug the music device in and
> > it works. It just seems to randomly work, i am worried as to why
> > something would just unmount for no aparent reason (or appear to)
> >
> > i did manage to get both working, and tried to copied 2 folders of music
> > across  to the player only half way through the copy dialog seemed to be
> > stalled,  so after a while i ended it,  and tried to unmount, i then got
> > another dialog saying it was writing remaining data, which again didn't
> > seem to be doing much, just displaying a status box with another bar
> > moving back and forth quickly.
> >
> > has anyone else had any issues trying to plug in two usb storage devices.
> >
> >
> > Paul
> >
> >
>
> --
> Glen Mehn
> glen.mehn at oba.co.uk
> skype: glenmehn | blog: http://glen.mehn.net/mba
> UK: +44(0)7942 675 755 | US: +1 415 704 4737
>
>
> --
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>
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