[sane-devel] HP Scanjet 8270 / Avision backend / user permissions

Tue Jan 11 11:11:33 UTC 2011

Hi Olivier,

It looks like the sources you are looking at are from the last release.
If you are going through the work of rebuilding your package, get the latest
version from the source repository.

The avision.desc file was in a funky state when I took over maintenance, and
I have since updated it with all of the HP 8200 series models.  The file is
updated automatically, only in so far as Rene had a script which he ran to
do the updating.  That script is not part of the sane source code.  The desc
file comes from the source file, but whereas the desc file benefits from
having all information, the source file only needs entries with unique SCSI
and USB information.  Thus, there are sections which are wrapped by #ifdef to
make the backend faster (by not probing for the same device more than once).

The HP 8200 series, for example, has two types of base hardware, the 8200,
and the 8270.  The difference between the models is that the 8200 has no ADF,
while the 8250 has a 15ppm ADF, and the 8290 has a 25ppm ADF.  The 8270 seems
to be identical to the 8290 in specs, but the USB ids are different, so maybe
the hardware is a newer design.  While I'm on the topic, it seems that the
8300 series, feature wise, shares the same base unit as the 8200, however it
has a much better ADF which supports scanning both sides of the page at the
same time at either 25ppm (8350) or 35ppm (8390).

I'm looking for testers for the 8300 series, if anyone out there has one.

Mike
(:

On Mon, Jan 10, 2011 at 04:28:16PM +0100, Olivier Crouzet wrote:
> Dear Julien, dear all,
> 
> I also cc this message to the adress that is indicated for bugs
> information on the SANE/avision backend page.
> 
> Julien, thanks for the help. Looking at doc/descriptions/avision.desc
> in the source tree, the file says it is actually computed automatically
> from avision.c
> 
> As a matter of fact, only the HP 8250 & 8290 are mentionned in
> doc/descriptions/avision.desc although the HP 8270 is mentionned in
> avision.c so I tried modifying avision.c (basic modifications)
> according to how I thought it may have any impact on this issue to no
> avail... I also tried to add the parts corresponding to the 8270
> checking for the correct model number directly into avision.desc,
> recompiling and reinstalling, to no avail neither.
> 
> Then I tried recompiling the package with the original development
> files for the avision backend and it suddenly started working as a
> regular user (but I'm perfectly unable to locate the reason why it
> worked as I thought I came back to the original situation),
> recognizing the scanner as a 8200 model (generic I suppose).
> 
> However, now after rebooting the computer it continues working
> only as root and can not access the usb port as a regular user (back as
> it was before) for this scanner...
> 
> Any hint ?
> 
> I've now tried recompiling again and again but still no access as a
> regular user... I only I knew what had changed when it was working...
> 
> I can send log files if you're insterested.
> 
> As a matter of fact (but it may be pointless), though there are lines
> like the following in avision.c:
> 
> #ifdef FAKE_ENTRIES_FOR_DESC_GENERATION
>     { "HP",      "C9930A",
>       0x03f0, 0x0b01,
>       "Hewlett-Packard", "ScanJet 8250",
>       0,0},
>     /* comment="1 pass, 4800 (?) dpi - USB 2.0" */
>     /* status="good" */
> #endif
> 
>     { "HP", "C9930A",
>       0x03f0, 0x3905,
>       "Hewlett-Packard", "ScanJet 8270",
>       0,0},
>     /* comment="1 pass, 4800 (?) dpi - USB 2.0" */
>     /* status="good" */
> 
> #ifdef FAKE_ENTRIES_FOR_DESC_GENERATION
>     { "HP", "C9930A",
>       0x03f0, 0x0b01,
>       "Hewlett-Packard", "ScanJet 8290",
>       0,0},
>     /* comment="1 pass, 4800 (?) dpi - USB 2.0 and SCSI - only SCSI
> tested so far" */ /* status="good" */
>     
> #endif 
> 
> There is no such thing as:
> 
> :model "ScanJet 8270"
> :interface "USB"
> :usbid "0x03f0" "0x3905"
> :comment "1 pass, 4800 (?) dpi - USB 2.0"
> :status :good
> 
> and only 8250 and 8290 parts are present in avision.desc
> 
> Yours sincerely.
> Olivier.
> 
> > Mike Kelly <mike at piratehaven.org> wrote:
> > 
> > Hi,
> > 
> > > I've never had to mess with this stuff, but there are others on the
> > > list who have.  This should be easy to fix.  In fact, I believe that
> > > there is a file in the source tree which helps udev configure
> > > scanners, so you might need to install that.
> > 
> > The udev rules are generated from the desc files using sane-desc. You
> > need to add the scanner to the desc file for avision and it'll appear
> > in the udev rules after that.
> > 
> > JB.
> > 
> 
> 
> -- 
>   Olivier Crouzet, PhD
>   Laboratoire de Linguistique -- EA3827
>   D?partement de Sciences du Langage
>   UFR Lettres et Langages
>   Universit? de Nantes
>   Chemin de la Censive du Tertre - BP 81227
>   44312 Nantes cedex 3
>   France
> 
>      phone:        (+33) 02 40 14 14 05 (lab.)
>                    (+33) 02 40 14 14 36 (office)
>      fax:          (+33) 02 40 14 13 27
>      e-mail:       olivier.crouzet at univ-nantes.fr
>  		
>   http://www.lling.fr/
>   
> 
> --
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-- 
--------Mike at PirateHaven.org-----------------------The_glass_is_too_big--------