Re: [linux-minidisc] Problem with Sharp IM-DR410 and netmdcli

[Michael Karcher <Michael.Karcher@fu-berlin.de>]

On Mon, 2012-04-09 at 01:36 +0200, John Paul Adrian Glaubitz wrote:
> On Mon, Apr 09, 2012 at 12:41:39AM +0200, El Numinos wrote:
> > Hi, I'm getting a strange response while trying to start netmdcli with
> > my Sharp IM-DR410 connected. See http://paste.debian.net/162576/ for
> > details.
> (snip)================================================================
> ?
> Raw title:  
> Disc Title: <Untitled>
> 
> netmd_poll: libusb_control_transfer failed
> netmd_exch_message: netmd_poll failed
> netmd_poll: libusb_control_transfer failed
> netmd_exch_message: netmd_poll failed
> 
> --Empty Groups--
> (snip)================================================================
> 
> While I currently have no idea what could be the origin of this error,
> I think we should perform a test with the SHARP NetMD that we own in
> the project.
I will verify whether the current code still works with the '899 next
weekend.

>  I remember Michael mentioning that some NetMD are more or
> less strict than others when it comes to timeouts etc.
The sharp unit is considerably slower on responding to commands, but it
should not affect the transfer on that layer we are observing problems
here. It looks like the USB interface of the unit hangs. Which is quite
surprising for a SHARP unit to me, as the '899 has a considerably more
robust USB interface (concerning protocol violations by our software)
than the MZ-RH1. A log of netmdcli with "-t" added would be interesting,
as it will dump the data sent over USB (so we can find out where
problems start to arise).

Regards,
  Michael Karcher