Ralph Little <[email protected]> wrote: > Hi, > > On 2020-12-03 4:48 p.m., Perry Hutchison wrote: > > This has to be something utterly trivial :( > > > > I have a Canon copier/printer/scanner on the same (wired) Ethernet > > as an Ubuntu Linux system. In the past this combination has "just > > worked" -- I didn't have to configure anything -- but today neither > > Simple Scan nor "scanimage -L" can find the scanner. > > > > The one change I know of is that, since the last time it was working, > > the scanner reported (via the front-panel LCD) that its IP address > > had changed; and the new IP address is a bit strange: 169.254.53.67, > > (previously 192.168.0.10, the local network being 192.168.0/24). > > Since it was found automatically before, and it does respond to ping > > at its new address, I would expect it to be found again despite the > > changed IP address. > > > Sounds to me like the printer is on a different subnet, so it would be > unlikely to be found automatically.
Nor, apparently, by adding its IP address to /etc/sane.d/net.conf or setting SANE_NET_HOSTS. That's why it had occurred to me to inquire whether there might be other "where to find the networked scanner" settings. > Do you know why the printer has acquired an IP address that is not > on the same subnet as your Linux machine? I know "how" it happened, but not "why." There was a power outage a while back, and after power came back on I noticed the "changed IP address" message on the scanner's LCD -- but I didn't notice that the new address was on a strange subnet until today (after discovering that the scanner wasn't being found). Interestingly, despite its being addressed on the wrong subnet, ping and traceroute still find it -- and (per traceroute) it does not take an extra hop (e.g. via the router) to reach it. > If the scanner setup for DHCP? I thought it was; it even has a reserved IP address (192.168.0.10) in the DHCP server (Netgear router). > Cheers, > Ralph
