[sane-devel] microtek2 --shadow/highlight

[Karsten Festag]

Hi,
it might well be that the firmware of the V310 doesn't understand the commands 
for shadow and highlight operations. The firmwares of the different microtek 
scanners have different peculiarities and that's why this isn't very easy to 
handle in the code (microtek has a unique driver for each scanner model :-(). 
For I don't have much time to spent on the microtek backend I don't really 
want to invest much work in your problem, sorry. But you are welcome to find 
your own solution and to commit it via the mailing list. You would have to 
disable the shadow/highlight.... options in the function 'init_options' 
depending on the scanner model.

Regards,

Karsten


On Wednesday 08 September 2004 23:48, Gene Stemple wrote:
> ScanMaker V310 (parport) works fine both gray & color; but if any
> of the /shadow/midtone/highlight/ options are changed from their
> defaults (mode=Gray) then scan fails.  Both scanimage and xscanimage
> fail the same way...
>
> sane-backends 1.0.13; microtek2 v0.95; Debian distribution.
> kernel 2.4.18; using modules ppscsi + onscsi.
>
> "scanimage -d microtek2:/dev/sg1 --mode Gray --resolution 150 \
> --no-backtracking=yes --shadow 80"
>  From debug output it appears that process starts normally, i.e. the
> same as successful scans, and proceeds thru "calculate_sane_params"
> and "scsi_wait_for_image" before infinite Busy loop times out.
>
> ---> sane_start --> scsi_read_image_status = Busy (forever) until
> retry count expires.
>
> Are shadow..highlight not supported in ScanMaker V310?
> Is this a known issue in microtek2 backend?
> If not, what debug dumps would be most helpful for a bug report?
>
> ...Gene...