[sane-devel] blank page scanned with CanoScan LiDE25

[m. allan noah]

the permissions of your program are irrelevant. it is the permissions
of the USB device file that matter. Usually, these devices are owned
by a group like scanner, and adding yourself to that group fixes the
problem.

allan

On Tue, Oct 21, 2008 at 7:50 AM, Y P <yellow.penguin at edpnet.be> wrote:
> Hi,
>
> On Mon, Oct 20, 2008 at 08:26:39PM -0400, m. allan noah wrote:
>> perhaps try to sudo your scanimage command.
>
> Well that works now.
> But:
>
>>if that helps, then you
>> need more permissions, perhaps adding yourself to group scanner will
>> be enough.
>
> It seems not: when I launch my homemade scanning script the scanimage
> message says:
> scanimage: no SANE devices found
>
> Note that I tryed th next:
> sudo chown yp:scanner /usr/local/bin/scan2*
> (to sete my scripts in the scanner group,
> idem I did: chown yp:scanner ~/lin_scans
> since taht's my destination dir.
>
> None of any changed something:
> ONLY sudo scan2* works.
>
> What am I missing ? (its an USB scanner, so I don't need any /dev/scanner or
> so ?
>
> Y P
>
> --- My orig. session ---
>> On Mon, Oct 20, 2008 at 2:13 PM, Y P <yellow.penguin at edpnet.be> wrote:
>> > Hello SANE-people,
>> >
>> > can someone help advising me ?
>> >
>> > - my scanner is a new Canon CanoScan LiDE25
>> > - my distro is Ubuntu Hardy
>> > - I use the sane-utils since I'm blind and 99.9% commandline user
>> > - the device seem to scan but the scanned page is blank;
>> > these are more details:
>> >
>> > # What's already installed or have been added:
>> > aldo at ubu:~$ dpkg -l |grep sane
>> > ii  libsane                                    1.0.19-1ubuntu3                          API library for scanners
>> >
>> > ii  sane-utils                                 1.0.19-1ubuntu3                          API library for scanners -- utilities
>> >
>> > (added by me)
>> > ii  xsane                                      0.995-1ubuntu1                           featureful graphical frontend for SANE (Scan
>> >
>> > ii  xsane-common                               0.995-1ubuntu1                           featureful graphical frontend for SANE (Scan
>> >
>> >
>> > # Test to see which groups the major user is being member of:
>> > aldo at ubu:~$ groups
>> > aldo adm dialout cdrom floppy audio dip video plugdev fuse lpadmin admin
>> >
>> > (I don't know if I must addgroup scanner and adduser aldo scanner ?
>> >
>> > aldo at ubu:~$ lsusb
>> > Bus 005 Device 001: ID 0000:0000
>> >
>> > Bus 004 Device 001: ID 0000:0000
>> >
>> > Bus 003 Device 002: ID 046d:c310 Logitech, Inc.
>> >
>> > Bus 003 Device 001: ID 0000:0000
>> >
>> > Bus 002 Device 002: ID 0a5c:2101 Broadcom Corp.
>> >
>> > Bus 002 Device 001: ID 0000:0000
>> >
>> > Bus 001 Device 005: ID 04a9:2220 Canon, Inc.
>> >
>> > Bus 001 Device 003: ID 05e3:0606 Genesys Logic, Inc. D-Link DUB-H4 USB 2.0 Hub
>> >
>> > Bus 001 Device 001: ID 0000:0000
>> >
>> > (the device is detected)
>> >
>> > aldo at ubu:~$ sane-find-scanner
>> >
>> >
>> >  # sane-find-scanner will now attempt to detect your scanner. If the
>> >
>> >  # result is different from what you expected, first make sure your
>> >
>> >  # scanner is powered up and properly connected to your computer.
>> >
>> >
>> >
>> >  # No SCSI scanners found. If you expected something different, make sure that
>> >
>> >  # you have loaded a kernel SCSI driver for your SCSI adapter.
>> >
>> >
>> >
>> > found USB scanner (vendor=0x04a9, product=0x2220, chip=LM983x?) at libusb:001:005
>> >
>> >  # Your USB scanner was (probably) detected. It may or may not be supported by
>> >
>> >  # SANE. Try scanimage -L and read the backend's manpage.
>> >
>> >
>> >
>> >  # Not checking for parallel port scanners.
>> >
>> >
>> >
>> >  # Most Scanners connected to the parallel port or other proprietary ports
>> >
>> >  # can't be detected by this program.
>> >
>> >
>> >
>> >  # You may want to run this program as root to find all devices. Once you
>> >
>> >  # found the scanner devices, be sure to adjust access permissions as
>> >
>> >  # necessary.
>> >
>> > (its type is USB, so that's OK)
>> >
>> > # now as user:
>> > aldo at ubu:~$ scanimage -L
>> >
>> >
>> > No scanners were identified. If you were expecting something different,
>> >
>> > check that the scanner is plugged in, turned on and detected by the
>> >
>> > sane-find-scanner tool (if appropriate). Please read the documentation
>> >
>> > which came with this software (README, FAQ, manpages).
>> >
>> >
>> > # As sudo:
>> > aldo at ubu:~$ sudo scanimage -L
>> > [sudo] password for aldo:
>> > device `plustek:libusb:001:005' is a Canon CanoScan LiDE25 flatbed scanner
>> >
>> >
>> > Now if I do:
>> > scanimage -v -p -l 0 -t 0 -x 215 -y 297 --mode Gray --format tiff --resolution 600 >/tmp/tmp.tiff
>> > convert /tmp/tmp.tiff oout.jpg
>> >
>> > it seems to scan, but friends are telling me the scanned doc is empty.
>> >
>> > I don't see what is wrong?
>> >
>> > Grtnx,
>> >
>> > Aldo.
>> >
>> >
>> > --
>> > 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
>> >
>>
>>
>>
>> --
>> "The truth is an offense, but not a sin"
>
> --
>        https://bugs.launchpad.net/ubuntu/+bug/1 :
> Micro$oft has a majority market share in the new desktop PC marketplace.
> This is a bug, which Ubuntu is designed to fix !
>        http://www.ubuntu.com/
>



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