[sane-devel] (no subject)

m. allan noah kitno455 at gmail.com
Tue Nov 6 19:51:54 UTC 2007

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.


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

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