On 04/12/2020 09.57, Felix Miata wrote: ...
Each is configured with a static IP (V4 only, same as rest of LAN).
...
Print test pages failed for both. /var/log/cups/error_log: E [04/Dec/2020:01:16:20 -0500] Unable to open listen socket for address [v1.::1]:631 - Address family not supported by protocol.
That corresponds to opening web page at http://localhost:631 using IPv6, which you say is disabled. Anyway, it is not a printer error.
E [04/Dec/2020:01:18:11 -0500] [cups-driverd] Bad driver information file \"/usr/share/cups/drv/sample.drv\"!
This is perhaps the problem.
W [04/Dec/2020:01:19:20 -0500] CreateProfile failed: org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager was not provided by any .service files
This I don't understand, but it is a Warning, not Error.
I tried opening http://localhost:631/admin to see the same 4 printers, with 3 idle, and one 8910 status "unable to locate printer "BRNMFC8910", which I then canceled. I then tried to print a test page, and received a no such file or directory error. Tail of /var/log/cups/error_log then contained: E [04/Dec/2020:02:55:43 -0500] [Client 210] Returning IPP client-error-document-format-not-supported for Send-Document (ipp://localhost:631/printers/HL5470DW) from localhost E [04/Dec/2020:03:12:09 -0500] [Client 237] Empty Basic username. E [04/Dec/2020:03:12:11 -0500] [Client 239] Empty Basic username. Same result for the other printer.
# journalctl -b | egrep -i 'ailed|rror' produces nothing related to any printer, as dmesg shows, unless 'broken atomic modeset userspace' counts.
Where to I go from here? Is this a YaST2 thing? Basesystem? Cups? Deps that are missing from Brother's rpms?
Enable debug mode in CUPS. Then try printing plain text file from the command line (command lpr). -- Cheers / Saludos, Carlos E. R. (from 15.1 x86_64 at Telcontar)