I have a Fujitsu ScanSnap ix500. It worked fine four weeks ago, but does not now. I did update my packages several times, so I'm not sure I have the same version of sane then I had before. Previously my scanner was connected through a USB-Hub and now its connected directly. I also currently have problems with policykit, but I assume they are not relevant here as I have the same problem when I start the programs as root.
-- Note: I've figured out that my underlying problem was that my version of sane-backend did not support xhci (usb 3) and the mainboard refused ehci. I could not fix it and use a different computer for scanning at the moment. This question is about the debugging options / logging toggles. I don't know how it ever worked on this machine, but it did. --
I've filed a bug report concerning the error message quality. Additional insight might be gained from there.
When I start xsane I get the error message:
Fehler beim Öffnen des Geräts `fujitsu:ScanSnap iX500:119468':
Fehler während Geräte I/O.
Translation:
open of device fujitsu:ScanSnap iX500:119468 failed: Error during device I/O
This only happens once, after that I can't connect to the scan snap at all anymore until I turn it off and on again, after that I get the above message again, once.
I attempted to get more details by starting xsane from command line:
$ xsane
Gtk-Message: Failed to load module "atk-bridge"
So, I activated additional debugging infos with:
export SANE_DEBUG_DLL=255
That produced (reduced to fujitsu and general parts, full output here)
$ xsane > xsane_output.txt
Gtk-Message: Failed to load module "atk-bridge"
[sanei_debug] Setting debug level of dll to 255.
[dll] sane_init: SANE dll backend version 1.0.13 from sane-backends 1.0.25
[dll] sane_init/read_dlld: attempting to open directory `./dll.d'
[dll] sane_init/read_dlld: attempting to open directory `/etc/sane.d/dll.d'
[dll] sane_init/read_dlld: using config directory `/etc/sane.d/dll.d'
[dll] sane_init/read_dlld: considering /etc/sane.d/dll.d/hplip
[dll] sane_init/read_config: reading dll.d/hplip
[dll] add_backend: adding backend `hpaio'
[dll] sane_init/read_dlld: considering /etc/sane.d/dll.d/libsane-extras
[dll] sane_init/read_config: reading dll.d/libsane-extras
[dll] add_backend: adding backend `ls5000'
[dll] sane_init/read_dlld: done.
[dll] sane_init/read_config: reading dll.conf
[...]
[dll] add_backend: adding backend `fujitsu'
[...]
[dll] sane_get_devices
[...]
[dll] load: searching backend `fujitsu' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-fujitsu.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-fujitsu.so.1'
[dll] init: initializing backend `fujitsu'
[dll] init: backend `fujitsu' is version 1.0.127
[...]
[dll] sane_get_devices: found 1 devices
[dll] sane_open: trying to open `fujitsu:ScanSnap iX500:119468'
# Program stays here while the i/o error message is displayed
[dll] sane_exit: exiting
[...]
[dll] sane_exit: calling backend `fujitsu's exit function
[...]
[dll] sane_exit: finished
I do not have saned running. When I tried to start it, it needed activation first and then nothing changed, so I deactivated it again.
When I use scanimage instead of xsane, I get this error message:
[dll] sane_get_devices: found 1 devices
[dll] sane_open: trying to open `fujitsu:ScanSnap iX500:119468'
scanimage: open of device fujitsu:ScanSnap iX500:119468 failed: Error during device I/O
[dll] sane_exit: exiting
I have no entries in /var/log/syslog at the time (besides the messages for plugging in and out of the scanner when I restart it). I did remove libsane-hpaio, but that didn't change anything either.
So, how do I get proper debugging messages to figure out whats my actual problem?
