There are so many moving pieces here that it's hard to get a handle on
this. I had trouble seeing local network printers so I tried following
the advice Zdenek published [1], but I ran into a nest of issues:
printing depending on avahi, which fails quietly and is hard to debug.
Specifically, I did *avahi-browse -avrt* which just returns with
avahi_service_browser_new() failed: Invalid service type
This seems to be related to a bug where some devices are sending
non-compliant data to avahi: https://github.com/lathiat/avahi/issues/212
but we're already far away from the print subsystem.. I tried running
avahi-browser under gdb but between the missing and not-autoloading
debuginfo packages, and the callback-style structure, I wasn't able to
catch it receiving the data that causes the problem.
I guess my point here is that we have a complex, interdependent system,
and when it fails, it is fairly opaque. At this point I am not sure what
to do: is the root cause here the avahi bug? I am willing to spend the
effort getting to the bottom of it but I can't figure out where to start.
On 5/24/21 1:42 PM, Stephen John Smoogen wrote:
I have had very bad luck in setting up new network printers over the
last 4 years. I can get all of them to print from Windows and Mac,
but every one of them from HP, Brother, and some other brands could
not print anything from Linux. They were all 'Linux ready' but were
doing it via either Google Print or a set of proprietary software
blobs to be put on the computer. [They even came with ipp filters but
they called the blobs]. I have a Brother MFC-27100W in my office
which I print to via my wife's Mac because of this.
I have written some basic info about how to find out whether your
printer supports driverless [1] and how to setup it [2]. If you have
at least F33 and have the device in your LAN, you can use temp queues
for sure, otherwise you need to create a permanent queue via lpadmin:
$ lpadmin -p <name> -v <uri from lpinfo -l -v or ippfind> -m everywhere -E
If you still experience the issue, do feel free to file a bug for cups
in bugzilla and I can look into it further.
[1]
https://fedoraproject.org/wiki/How_to_debug_printing_problems#How_to_find_out_whether_my_printer_is_capable_of_driverless_printing.3F
[2]
https://fedoraproject.org/wiki/How_to_debug_printing_problems#How_to_setup_CUPS_temporary_queues_with_network_printer
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