[sane-devel] (no subject)

[m. allan noah]

On 11/6/07, abel deuring <adeuring at gmx.net> wrote:
> On 06.11.2007 20:07, Mauricio Villamil wrote:
> > Hello,
> >
> > reading the SANE Docs, I found that it is possible to set up the
> Environmental variable for a larger buffer size:
> >
> > SANE_SG_BUFFERSIZE, I have my RICOH_IS420 scanner hooked uo to Fedora core
> 6 and it is working well, I just want to set up the variable to a larger
> size ,but I don't knoe how??, which files need editing ??
>
>
> You can set environment variables from a shell, i.e., a "command line"
> window and start a Sane frontend from the _same_ shell, like so:
>
> export SANE_SG_BUFFERSIZE=131072
> xsane
>
> But if the scanner works fine, there should not be any need to do this.
> This option is useful only in the case that a scanner stops the scan
> head very often during a scan. Increasing the buffer size and thus
> increasing the amount of data transferred for one read command can help
> to reduce the number of such scan head stops. But I assume that a
> document scanner like the IS420 does not show such scan head stops.
>

you also did not say what backend you are using to drive the scanner, but
you might want to check the backend's docs to see if it has a separate buffer
size control. but, in general, abel is correct, you typically dont
need to increase this.

allan


-- 
"The truth is an offense, but not a sin"