[sane-devel] HP Scanjet 8270 / Avision backend / ok but strange issue

[Olivier Crouzet]

Dear all, as the list blocks big messages, I send this message again
with only one of the logfiles (debugbig.log) for your
information. The other logs have been sent to Mike's adress and I can
provide them to anyone who would need them.

Olivier.
######################################################################

Dear Mike,

sorry for the delay, the scanner is at work so I had to wait before I
could do the test you asked for.

Here are the results. Attached are several logfiles. 

1 - debugsmall.log:
env SANE_DEBUG_AVISION=7 scanimage --resolution=150 2> debugsmall.log
> smallfile.pnm

Scanning color images seems to be fine at least up to 2400 dpi but does
not work starting at 3200 dpi (haven't tried between 2400 and 3200 /
4800).

2 - debugbig.log: 
env SANE_DEBUG_AVISION=7 scanimage --resolution=4800 2> debugbig.log
> bigfile.pnm

At this resolution (4800 dpi) but also at 3200 dpi, the scanner does
not work. After scanimage has left, the scanner is not available anymore
and I need to unplug the usb cable to get it back to work so I also
attach a debug file produced during a call to scanimage with the same
command as in 1 without unplugging the USB cable:

3 - debugsmallpostbig.log: 
env SANE_DEBUG_AVISION=7 scanimage --resolution=150 2>
debugsmallpostbig.log > smallfilepostbig.pnm

All this has been performed as root. I'll now deal with the advice from
Julien Blache concerning user permissions and udev.

Thanks for the help.
Please let me know if you need more information or complementary tests.

Olivier.


Le Sat, 8 Jan 2011 11:08:59 +0900, Mike Kelly a écrit :

> Hi,
> 
> That's great news, I've been hoping for a report on this scanner.
> I'm glad to hear that it works.  The only outstanding issue might be
> high resolution scans.  Could you run a high resolution scan test?
> 
> env SANE_DEBUG_AVISION=7 scanimage --resolution=4800 2> debug.log >  
> bigfile.pnm
> 
> and send me the debug.log file?
> 
> As for having to run as root, it sounds like a permissions issue
> with the udev system.  Probably, when the scanner is connected, the
> device file is not given normal scanner permissions because it is
> not associated with scanning in the config files.  I must confess
> that 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.
> 
> Mike
> (:
> 
> On Jan 7, 2011, at 23:44, Olivier Crouzet
> <olivier.crouzet at univ-nantes.fr 
>  > wrote:
> 
> > Dear all,
> >
> > I've just received this HP Scanjet 8270 (ADF) scanner two days ago
> > and I'm in the process of getting it working with my Debian Testing
> > workstation.
> >
> > As this scanner needs the latest version of the avision backend,
> > I've recompiled the libsane-backends Debian package after having
> > replaced the avision.* files in the source as stated on the avision
> > backend web page. I've now reinstalled the package and the scanner
> > works almost flawlessly for what I've tried up to now (ADF works,
> > gray / color no issue).
> >
> > However, though I own another old Epson scanner which I can use as a
> > regular user, It seems I can only use the new HP as root... No need
> > to say I'm a member of the "scanner" group... I've tried to locate  
> > various
> > information concerning the possibility of specifying users
> > permissions for usb devices but all the information I can find
> > seems to concern old
> > kernels / udev... systems... Is it possible that it is related to
> > the backend itself ???
> >
> > Any hint ? I haven't recompiled the whole of sane (only the
> > backends), is it a possible source of this issue ?
> >
> > Thanks anyway for the development of the avision backend.
> >
> > Olivier.
> >
> >
> > -- 
> > Olivier Crouzet, PhD
> > Laboratoire de Linguistique -- EA3827
> > Département de Sciences du Langage
> > UFR Lettres et Langages
> > Université 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/
> >
> >
> > --
> > sane-devel mailing list: sane-devel at lists.alioth.debian.org
> > http://lists.alioth.debian.org/mailman/listinfo/sane-devel
> > Unsubscribe: Send mail with subject "unsubscribe your_password"
> >            to sane-devel-request at lists.alioth.debian.org
> 


-- 
  Olivier Crouzet, PhD
  Laboratoire de Linguistique -- EA3827
  Département de Sciences du Langage
  UFR Lettres et Langages
  Université 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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