Server 20.04 - sane is not responding

[Gene Heskett]

On Saturday 23 May 2020 10:15:44 David Fletcher wrote:

> On Sat, 2020-05-23 at 12:34 +0200, Oliver Grawert wrote:
> > hi,
> >
> > Am Freitag, den 22.05.2020, 21:01 +0100 schrieb David Fletcher:
> > > administrator at ServerIV:$ sudo systemctl unmask saned
> > > [sudo] password for administrator:
> > > administrator at ServerIV:$ sudo systemctl enable --now saned
> > > Synchronizing state of saned.service with SysV service script with
> > > /lib/systemd/systemd-sysv-install.
> > > Executing: /lib/systemd/systemd-sysv-install enable saned
> > > Failed to enable unit: Unit file /lib/systemd/system/saned.service
> > > is masked.
> >
> > this either means the actual unit to switch back to when unmasking
> > is not actually there or that your machine watched too many covid
> > news and is too scared to take off the mask now ...
> >
> > try
> >
> > sudo apt install sane-utils
> >
> > see if the symlink to /dev/null is gone after this. if not, do the
> > systemctl unmask and enable dance again, the unmasking should
> > hopefully work... (if that still doesnt work, just rm the symlink
> > manually)
>
> I now get:-
> administrator at ServerIV:~$ sudo systemctl unmask saned
> administrator at ServerIV:~$ sudo systemctl enable --now saned
> saned.service is not a native service, redirecting to
> systemd-sysv-install.
> Executing: /lib/systemd/systemd-sysv-install enable saned
> administrator at ServerIV:~$
>
> xsane still says no devices available.
>
That sounds a bit like its address is out of the 256 address block the 
rest of your network is on. I've a huge 11x17 capable brother MFC and I 
had to go into its own panel menu's and put its ipv4 address into my 
home net block as I'm not running in the 192.168.0 or 1.xxx block. Now 
it Just Works.

You may have to do the same before sane can find it.  This printer also 
has usb ports but they are buried so deep inside it that a 5 foot usb 
cable isn't long enough to reach the cpu machine so there is usb-3 hub 
hanging in mid-air behind it. But I don't think sane can find it as a 
usb-3 device so both cables are plugged in.

> I've even tried powering up the 14.04 system again and adding its new
> address to /etc/sane.d/net.conf on the desktop and now that won't work
> either! Grrrrr
>
> I also added
> RUN=yes
> to /etc/default/saned as per
> https://help.ubuntu.com/community/ScanningHowTo#Sharing_a_Scanner_Over
>_a_Network and it still won't work.
>
> Does this shed any light on why?
> administrator at ServerIV:~$ service saned start
> ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
> Authentication is required to start 'saned.service'.
> Authenticating as: David Fletcher (administrator)
> Password:
> ==== AUTHENTICATION COMPLETE ===
> Job for saned.service failed because the control process exited with
> error code.
> See "systemctl status saned.service" and "journalctl -xe" for details.
> administrator at ServerIV:~$ systemctl status saned.service
> ● saned.service - LSB: SANE network scanner server
>      Loaded: loaded (/etc/init.d/saned; generated)
>      Active: failed (Result: exit-code) since Sat 2020-05-23 14:42:44
> BST; 37s ago
>        Docs: man:systemd-sysv-generator(8)
>     Process: 3707 ExecStart=/etc/init.d/saned start (code=exited,
> status=1/FAILURE)
>
> May 23 14:42:44 ServerIV saned[3707]:  * Starting SANE network scanner
> server saned
> May 23 14:42:44 ServerIV saned[3729]: saned (AF-indep+IPv6) from
> sane-backends 1.0.29 starting up
> May 23 14:42:44 ServerIV saned[3729]: do_bindings: [1] bind failed:
> Address already in use
> May 23 14:42:44 ServerIV saned[3729]: do_bindings: [0] bind failed:
> Address already in use
> May 23 14:42:44 ServerIV saned[3729]: do_bindings: couldn't bind an
> address. Exiting.
> May 23 14:42:44 ServerIV saned[3729]: FATAL ERROR; bailing out,
> waiting for children...
> May 23 14:42:44 ServerIV saned[3729]: bail_out: all children exited
> May 23 14:42:44 ServerIV systemd[1]: saned.service: Control process
> exited, code=exited, status=1/FAILURE
> May 23 14:42:44 ServerIV systemd[1]: saned.service: Failed with result
> 'exit-code'.
> May 23 14:42:44 ServerIV systemd[1]: Failed to start LSB: SANE network
> scanner server.
> administrator at ServerIV:~$
>
> Something to do with ipv6 which I'm not using yet because Virgin Media
> is still in the last century?
>
> I've had enough of this for now. I know what SANE stands for but for
> me today, it isn't. Off out for a walk if it's not raining.
>
> Dave


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>