[sane-devel] "hp4200" backend detects non-HP scanners as HP ScanJet 4200

Henning Meier-Geinitz henning at meier-geinitz.de
Thu Sep 4 10:24:09 BST 2003


On Sun, Aug 31, 2003 at 02:04:38PM +0200, Till Kamppeter wrote:
> Now, within the two days which me original posting needed to arrive on 
> the SANE list, there is more information. See
> http://qa.mandrakesoft.com/show_bug.cgi?id=4987
> Especially also a user with a Mustek ScanExpress 1200 ("gt68xx" driver) 
> observed this problem. It seems that the "hp4200" backend recognizes 
> every scanner on USB as an HP ScanJet 4200.

There is a macro "NO_AUTODETECT" that's used in that code. Maybe it's

Anyway, the code assumes that the parameter for sanei_usb_open is a
filedescriptor and uses open instead of sanei_usb_open. That's not
possible anymore in recent SANE versions. I'm pretty much surprised
that it works at all.

That external backend needs a maintainer to avoid bit-rot.


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