[sane-devel] Xsane --> Canon Pixma scanner problems

[thierry at ordissimo.com]

Le 2019-03-04 06:17, Bill a écrit :
> Dear Sir/Madam:
> 
>     My system is Ubuntu 18.04.2 with a new Canon Pixma TS6220, which
> replaces an HP Photosmart 6520.
>     All of the following comments refer to my new Canon printer. Xsane
> with my recently retired HP works perfectly (except, I think the Canon
> images are the better).
> 
> 1) I am able to move the dashed lines to frame the print to be
> scanned, but the output always contains the images of what ever is on
> the platen on a "full size" white background.
> 2) I have selected “inches” as the unit of measurement, but the
> preview window has “px” in the upper left corner, and the
> dimensions in the windows at the bottom of the main menu are in
> pixels. These dimensions do not change as I adjust the frame of the
> photo to be scanned and always read 2480*3507*24 (24.9MB).
> 3) There are no length markings along the side or top of the preview
> window.
> 4) In Advanced Options, the UOM displays “px”. The sliders change
> as I adjust the frame, but for a 4” x 6” photo in the upper left
> corner, the lower right corner is shown to be .00235x, .00154y.
> 5) For all resolutions > 75 ppi, the scanned image of the photos is
> very dark/saturated – beyond my ability to correct.
> 6) Max scan resolution in the main menu is only 300, whereas it is
> 1200 with the HP scanner.
> 
Hier Bill

Remove scangearmp2.
Sane supports the USB very well.

Thierry

>     This printer is WiFi equipped, but I am using it with a usb cable
> as my pc and printer are on the 2nd floor of our house while the
> router and my wife’s pc are on the 1st floor. I am willing to help
> out in the testing of your Pixma backend if I can be of any
> assistance.
> 
> Kind regards,
> 
> Bill
> 
> System info:
> 
> $ uname -a
> Linux XXX 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC
> 2019 x86_64 x86_64 x86_64 GNU/Linux
> 
> $ lsb_release -a
> No LSB modules are available.
> Distributor ID:    Ubuntu
> Description:    Ubuntu 18.04.2 LTS
> Release:    18.04
> Codename:    bionic
> 
> $ lsusb
> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 001 Device 008: ID 04a9:1856 Canon, Inc.
> Bus 001 Device 005: ID 0bda:0153 Realtek Semiconductor Corp. Mass
> Storage Device
> Bus 001 Device 004: ID 05e3:0608 Genesys Logic, Inc. Hub
> Bus 001 Device 003: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop
> Laser
> Bus 001 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> 
> $ sudo 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 [Canon], product=0x1856 [TS6200
> series]) at libusb:001:008
> could not fetch string descriptor: Pipe error
> could not fetch string descriptor: Pipe error
>   # 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.
> 
> $ scanimage -L
> device `canon_pixma:libusb:001:008' is a CANON TS6200 series flatbed
> scanner