On Sat, 16 Mar 2019, Jack Hill wrote:
Hi Guix,
I'm trying to color calibrate my scanner while running GNOME by following
these instructions:
https://help.gnome.org/users/gnome-help/stable/color-calibrate-scanner.html.en
I have produced a tiff of my calibration target, but my scanner doesn't show
up in the GNOME settings color submenu. The only device show is my laptop
screen.
GNOME's simple-scan and sane-backend's* scanimage can use the scanner, and
scanimage reports it as:
$ scanimage -L
device `pixma:MF4800_Canon5e5c59' is a CANON Canon i-SENSYS MF4800 Series
multi-function peripheral
The device is connected over the network.
What should I do to try to calibrate my scanner?
I've done some more troubleshooting:
I installed GNOME 3.30 (newer GNOME than current Guix master) on a Debian
10 (buster, testing) host. The scanner did not show up in the calibration
dialog when connecting over the network. I suspect that this is because
GNOME hardware/calibration does not trigger the search of the network for
scanners. When I plugged it in via USB, it did show up in the calibration
dialog. (Unfortunately, it doesn't scan over USB because of some as yet
undetermined bug in sane or the device firmware (I'm extra suspicious of
it because it is a multi-function device, so I imagine is more complex.).)
On Guix, when the scanner is connected via USB it cannot be found by my
user's scanning programs (or, therefore, the GNOME hardware/calibration
dialog). However, it can be found as root. I suspect the problem is a
missing udev rule. What is the right way to proceed?
Best,
Jack
