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On Thursday, 29 October 2020 14:16:17 GMT Peter Humphrey wrote: |
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> Afternoon all, |
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> |
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> Before my trials with booting, and eventually rebuilding everything from the |
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> ground up, my Lexmark C2425 printer was working fine. Now the KDE system |
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> settings printer applet can't detect it, even though pinging it works. |
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Is the IP address of the printer the same? |
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When you 'nmap -A -T4 -Pn -v <PRINTER_IP>' do you see open ports? It should |
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offer 80, 443, 515, 9100, 631 depending on the protocols it uses. |
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> Then when I point firefox to localhost:631 cups's behaviour has changed. If |
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> I click Adding Printers and Classes, instead of a dialogue to let me add a |
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> printer I now get a help page telling me how to do it at the command line. |
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Hmm ... something must be amiss in your setup. When I go to the |
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Administration tab and click to add another printer the familiar cupsd GUI |
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offers various protocols to choose from. Have you set USE="X"? |
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Bear in mind, I don't use any network upnp autoconfiguration service on my LAN |
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and therefore my use flags may be different to yours: |
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$ equery u cups |
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[ Legend : U - final flag setting for installation] |
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[ : I - package is installed with flag ] |
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[ Colors : set, unset ] |
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* Found these USE flags for net-print/cups-2.3.3-r1: |
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U I |
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+ + X : Add support for X11 |
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- - abi_x86_32 : 32-bit (x86) libraries |
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+ + acl : Add support for Access Control Lists |
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+ + dbus : Enable dbus support for anything that needs it (gpsd, |
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gnomemeeting, etc) |
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- - debug : Enable extra debug codepaths, like asserts and extra |
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output. If you want to get meaningful backtraces see https://wiki.gentoo.org/ |
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wiki/Project:Quality_Assurance/Backtraces |
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- - kerberos : Add kerberos support |
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- - lprng-compat : Do not install lp... binaries so cups and lprng can |
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coexist. |
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+ + pam : Add support for PAM (Pluggable Authentication Modules) - |
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DANGEROUS to arbitrarily flip |
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+ + ssl : Add support for SSL/TLS connections (Secure Socket Layer / |
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Transport Layer Security) |
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- - static-libs : Build static versions of dynamic libraries as well |
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- - systemd : Enable use of systemd-specific libraries and features like |
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socket activation or session tracking |
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+ + threads : Add threads support for various packages. Usually pthreads |
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+ + usb : Add USB support to applications that have optional USB |
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support (e.g. cups) |
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- - xinetd : Add support for the xinetd super-server |
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- - zeroconf : Support for DNS Service Discovery (DNS-SD) |
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> Even if I do manage to add the printer, cups reports that it isn't |
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> responding. I take this to mean I'm not using the right protocol. I've |
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> tried IPP, IPPS, HTTP and HTTPS, following that help page. |
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You haven't locked down the printer itself to limit which IP addresses it will |
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allow connections from? |
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Have a look here in case there is some step you've missed out: |
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https://wiki.gentoo.org/wiki/Printing |
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> Package.use is the same as before, and I've tried with cups-browsed both |
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> running and not. |
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> |
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> What am I missing? |
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Cups usually captures informative logs and you can set increased verbosity for |
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more detail. What do these logs report? |
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