I R A Darth Aggie  wrote:
> On Mon, 24 Feb 2020 00:28:30 +0000 (UTC),
> bob prohaska , in
>  wrote:
>>  Trying to set up Buster to print over a LAN to a
>>  Brother MFC8480dn B&W laster printer. Cups installed
>>  without obvious issues, runs as expected and finds
>>  the printer by IP address. I fed it a .ppd file and
>>  all seems good. Cups 2.2.10 can see the printer, read
>>  the defaults and make changes.
>>
>>  When I print a test page cups reports "filter failed",
>>  a little later it reports "unable to locate...."
>>
>>  AIUI, there shouldn't be any filters because the printer
>>  supports PostScript.
>>
>>  Anybody got a clue? First time I set up Jessie for the
>>  same printer it seemed a lot easier.....
>
> What was it unable to locate? in my experience, those tend to be a
> perl script that isn't installed or isn't invoked correctly.
>
"Unable to locate printer "BRN001BA9A3D6ED"." 
The printer was found and configured using the "find new printers"
options, which seems to be what generated that name.

The printer answers ping, so I know it's up, on this latest test
CUPS didn't report "filter failed" for some reason.

Hold the presses! I ran "find printers" for the tenth time and it worked.
The trick seems to be visiting the Home page of the server,
then immediately selecting "find new printers", at which
point the protocol turns out to be "socket". Apparently my
random wanderings through the CUPS server links caused the trouble.

Thanks for replying, and apologies for the noise!

bob prohaska

> These maybe of use
>
> https://www.openprinting.org/printer/Brother/Brother-MFC-8480DN
>
https://support.brother.com/g/b/downloadtop.aspx?c=us&lang=en&prod=mfc8480dn_us
>

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