how to tell if scanner is simply not supported hp scanjet pro 2500 f1

[garberw]

# installation howto for fedora users  (some steps may be missing) plus I need  help with my bug
# first install the scanner with hplip rpm package and run hp-setup and hp-plugin
sudo dnf install libusb-devel libconfuse-devel libudev-devel dbus-devel sane-backends-devel sane-backends-daemon
# sane-backends-daemon installs saned user and group
# see README for scanbd
./configure --disable-Werror
# do not use --enable-scanbuttond ; this just enables older drivers which mask the ones we want
make all
sudo make install
# backup the following two files to .orig
/etc/sane.d/saned.conf   (two line file)
------------>
connect_timeout = 3
localhost
<--------------
/etc/sane.d/dll.conf  (one line file)
------------->
net
<-------------
sudo cp integration/scanbd_dbus.conf    /etc/dbus-1/system.d
# reboot
# turn on scanner
sudo cp -a /etc/sane.d/dll.d   /usr/local/etc/scanbd/
sudo cp -a /etc/sane.d/hp*    /usr/local/etc/scanbd/
sudo cp -a /etc/sane.d/dll.conf.orig /usr/local/etc/scanbd/dll.conf
# edit and remove "net" line from previous file dll.conf; this is the original file ...
# from /etc/sane.d with the driver for the hp scanner uncommented;
edit /usr/local/etc/scanbd/scanbd.conf     (this is for fedora)  (only changes to defaults are shown)
------------->
user = saned
group = saned
# group = scanner ??????
# hp drivers
scanbuttond_backends_dir = "/usr/lib/sane"
environment {
  device = "dbus device"
  action = "insert"
}
function function_knob {
  filter = "^source.*"
  desc = "The value of the function knob / wheel / selector"
# fixme
  env = "SCANBD_FUNCTION"
}
action preview {
  filter = "^preview.*"
  numerical-trigger {
    from-value = 0
    to-value = 1
  }
  desc = "Preview"
  script = "test.script"
}
# include(scanner.d/hp.conf)
include(scanner.d/myscanner.conf)
<-------------
/usr/local/etc/scanbd/scanner.d/myscanner.conf   is the same as /usr/local/etc/scanbd/scanner.d/hp.conf     except:
------------->
device hp2500 {
  filter = "^hpgt2500.*"
  desc = "HP"
  action test {
    filter = ".*preview.*"
    desc = "test"
    script = "test.script"
  }
}
<-------------
sudo systemctl enable --now saned.socket
sudo systemctl enable --now scanbd     # also sets up another socket
sudo systemctl status scanbd
journalctl -f 
# try scanning buttons nothing happens

wg.scanlog.2021-08-25T08:20:31-07:00.log
can anyone help or show me why this scanner does not work please?

[mdengler]

why does this scanner not work

Thanks for the effort of gathering the debug logs and information. Unfortunately I am only an occasional user and don't know how to help. You may have some luck searching the web for "sane" or "twain" as well as "hp2500 scanner support"