sane crashes

[Polytropon]

On Sun, 22 Mar 2020 09:30:38 -0400, Vlad D. Markov via freebsd-questions wrote:
> On Sat, 21 Mar 2020 18:43:07 -0400
> "Vlad D. Markov via freebsd-questions" <freebsd-questions at freebsd.org> wrote:
> 
> > On Sat, 21 Mar 2020 18:37:03 -0400
> > "Vlad D. Markov via freebsd-questions" <freebsd-questions at freebsd.org> wrote:
> > 
> > > 
> > > I am having some problems using sane for scanning.
> > > 
> > > My version of FreeBSD:
> > > FreeBSD happy 12.1-RELEASE-p2 FreeBSD 12.1-RELEASE-p2 GENERIC  amd64
> > > 
> > > My version of sane:
> > > happy$ scanimage -V
> > > scanimage (sane-backends) 1.0.29; backend version 1.0.29
> > > 
> > > I have tried multiple approaches to get things working:
> > > 
> > > The scanner is an HP so I set the URI and tried:
> > > 
> > > happy$ xsane "hpaio:/net/OfficeJet_Pro_6970?ip=192.168.1.37"
> > > Assertion failed: (p), function avahi_threaded_poll_lock, file thread-watch.c, line 171.
> > > Abort trap (core dumped)
> > > 
> > > Next try:
> > > 
> > > happy$ scanimage -L
> > > Assertion failed: (p), function avahi_threaded_poll_lock, file thread-watch.c, line 171.
> > > Abort trap
> > > 
> > > Recompile minus Avahi:
> > > happy$ scanimage -L
> > > device `hpaio:/net/OfficeJet_Pro_6970?ip=192.168.1.37' is a Hewlett-Packard OfficeJet_Pro_6970 all-in-one
> > > 
> > > Maybe this will help the next person.
> > > 
> > > Vlad
> > > 
> > Jumped the gun here. The last method also has an issue when doing a scan:
> > 
> > happy$ dbus[8796]: arguments to dbus_connection_send() were incorrect, assertion "connection != NULL" failed in file dbus-connection.c line 3311.
> > This is normally a bug in some application using the D-Bus library.
> > 
> >   D-Bus not built with -rdynamic so unable to print a backtrace
> > 
> > 
> > 
> > 
> avahi-daemon and dbusd weren't running. For some reason they didn't
> start via rc.conf.

Do you have dbus_enable="YES" in your /etc/rc.conf file? Do the
system logs contain an error message about why DBus could not be
started? (If you're using Gnome, the related _enable variable
usually implies starting HAL and DBus.)

Reacting to a non-running DBus by core dumping doesn't look very
good... oh, and according to "man 8 avahi-daemon":

	Upon   startup	avahi-daemon   interprets   its	  configuration	  file
	/home/lennart/tmp/avahi/usr/local/etc/avahi/avahi-daemon.conf and reads
	XML fragments from /home/lennart/tmp/avahi/etc/avahi/services/*.service
	which  may define static	DNS-SD services.

Because /home/lennart/tmp is a standard system configuration
location present on every FreeBSD box... ;-)

Source:

https://www.freebsd.org/cgi/man.cgi?query=avahi-daemon


-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...