I don't really know.  There could be a problem with the ugen driver,
but there could also be a problem with the device.  I suspect that the
handling of the data toggle (the alternating-bit protocol) for bulk
transfers might be wrong.  A device bug in the handling of the data
toggle (e.g. not resetting according to the spec) could exhibit some
behaviour like this.

	-- Lennart

iMil wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 
>>If you don't keep it open, could you try that?
> 
> 
> ok, I'm getting results. Instead of closing endpoints on every bulk
> read/write, I opened it on the parent function. This only modification did
> nothing. But then, I added a small loop (2) on my "get_firmware" function
> and guess what :
> 
> 1. the loop succeeds
> 2. when I stop / relauch the proram, it doesn't hang anymore
> 
> My question is, why must I query 2 times the player so read() don't lock ?
> 
> - -------------------------
> iMil <imil@home.imil.net>                                                 _
>      http://gcu-squad.org                          ASCII ribbon campaign ( )
>                                                     - against HTML email  X
>                                                                 & vCards / \
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.3 (FreeBSD)
> 
> iD8DBQE/8rQWFG3BlGWyzUIRAuQnAJ9UVaJN15hG5oF0rZ/rn8IhEepzhACcDnF5
> +xLaUCmpF8ubj1OtbdProQ4=
> =Wb8V
> -----END PGP SIGNATURE-----
>