Re: what is sitting on USB device?
On 2018-10-23, Mark Copper <mcopper@straitcity.com> wrote:
> Trying to connect to a device, I get this error message:
>
> *** Error ***
> An error occurred in the io-library ('Could not claim the USB
> device'): Could not claim interface 0 (Device or resource busy). Make
> sure no other program (gvfs-gphoto2-volume-monitor) or kernel module
> (such as sdc2xx, stv680, spca50x) is using the device and you have
> read/write access to the device.
> *** Error (-53: 'Could not claim the USB device') ***
>
> On general Linux principles, how does one go about what is keeping the
> device busy? How does one distinguish between "busy" and a permissions
> problem?
On the internets I glanced at a forum thread where someone opined that
'gvfs-gphoto2-volume-monitor' might get in the way of camera-like
thingamajiggers:
ps aux | grep gphoto
to see whether this theory is viable or not (and if it is, you know, close or stop
or kill that gvfs puppy maybe).
> I can see that the system detects the device by, say, lsusb:
> bus 001 device 007 ... Nikon
>
> I haven't got anywhere with "lsof", but that at that point the
> specifics of this system may come into play (Debian 9 installed as a
> Crouton target on a chromebook).
>
> Any suggestions off-hand?
>
> Thanks.
>
>
--
"Now she understood that Anna could not have been in lilac, and that her charm
was just that she always stood out against her attire, that her dress could
never be noticeable on her." Leo Tolstoy, Anna Karenina
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