[sane-devel] Canon DR-7550 I/O Error

[m. allan noah]

This machine is untested. Apparently it does not like the buffering
command. This command might be unsupported, or it might have a
different format for this machine. Can you get a log of the scanner in
action under windows, using this software:
http://www.pcausa.com/Utilities/UsbSnoop/

If not, we can just disable this command, and rebuild sane-backends from source.

allan

On Fri, Nov 25, 2011 at 10:39 AM, Furio Settimi <ris at bresciaservice.com> wrote:
> Hi,
> I have some problem with Canon DR-7550 on Slackware 13.37 with Sane
> V:10.0.22
> When I try this command or other options, the report is every time this.
> Example:
>
> SANE_DEBUG_CANON_DR=25 scanimage  > file.tiff
>
> ....
> [canon_dr] ssm_buffer: start
> [canon_dr] do_usb_cmd: start
> [canon_dr] cmd: writing 24 bytes, timeout 30000
> [canon_dr] cmd: wrote 24 bytes, retVal 0
> [canon_dr] out: writing 32 bytes, timeout 30000
> [canon_dr] out: wrote 0 bytes, retVal 9
> [canon_dr] out: wrong size 32/0
> [canon_dr] ssm_buffer: finish
> [canon_dr] sane_start: ERROR: cannot ssm buffer
> [canon_dr] sane_start: error 9
> scanimage: sane_start: Error during device I/O
> [canon_dr] sane_cancel: finish
> [canon_dr] sane_close: start
> .....
>
> thank You
>
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