[sane-devel] Failed to start scanner : Error during device I/O on Canon N656U on Debian sid

[Gerhard Jaeger]

On Sunday 27 March 2005 15:07, Harobed wrote:
> Hi,=20
>=20
> I would like use my Canon N656U scanner on Debian sid. I use kernel=20
> 2.6.10 on Laptop Acer TravelMate 292LMi.=20
>=20
> I've do my test with Debian package (apt-get install sane xsane=20
> sane-utils) and I also do test on compiled version of=20
> sane-backends-1.0.15, sane-frontends-1.0.13 and xsane-0.97=20
>=20
> When I launch sane-find-scanner I've this :=20
>=20
> Harobed:/usr/local/src# sane-find-scanner=20
>=20
>   # No SCSI scanners found. If you expected something different, make=20
> sure that=20
>   # you have loaded a SCSI driver for your SCSI adapter.=20
>   # Also you need support for SCSI Generic (sg) in your operating
> system.=20
>   # If using Linux, try "modprobe sg".=20
>=20
> found USB scanner (vendor=3D0x04a9 [Canon], product=3D0x2206 [CanoScan],=
=20
> chip=3DLM9832/3) at libusb:002:022=20
>   # Your USB scanner was (probably) detected. It may or may not be=20
> supported by=20
>   # SANE. Try scanimage -L and read the backend's manpage.=20
>=20
>   # Not checking for parallel port scanners.=20
>=20
>   # Most Scanners connected to the parallel port or other proprietary
> ports=20
>   # can't be detected by this program.=20
>=20
> When I start scanimage -L, I've this :=20
>=20
> Harobed:/usr/local/src# scanimage -L=20
> device `plustek:libusb:002:022' is a Canon N650U/N656U USB flatbed
> scanner=20
>=20
> When I launch xsane, and I click on Acquire preview I've this popup
> dialog error : "Failed to start scanner: Error during device I/O".=20
>=20
> The attach file is log file of debug environement variable :
> SANE_DEBUG_PLUSTEK=3D128=20
>=20
> Thanks for your help,=20
> St=E9phane KLEIN=20
>=20
Hi,

=46OA, there is no need to send the request twice and there is also no need
to send it to sane-standard!
Regarding your problem, it seems, that the underlying USB subsystem makes
some troubles - could you check the system log? What version of libusb
are you using? When using 0.1.10, try downgrading to 0.1.8.

Ciao,
Gerhard