Epson printers - one good, one bad getting: cups-pki-expired

Hardware Support
1

I'm trying out Zorin Lite as a possible replacement for LM MATE which was a replacement for a while for Win XP.

I've got 3 printers connected by WiFi to Windows 11, LM 18.3 and Zorin Lite. Brother MFC and 2 X Epson WF-3640. One problem there.

Problem description: One of the WF-3640's won't print from Zorin Lite.
It shows a Printer error box that reads
Printer 'Epson WF_3640_Series_50EBF7': 'cups-pki-expired'.
The Printer settings will not stay Enabled, I click Enabled, it shows the tick, I try to print, return to Settings and Enabled is no longer ticked.
Also "Connecting to printer" shows indefinitely in printing progress window.

Have tried:
Switching printer on and off.
Deleting printer from Zorin.
Updating printer drivers using latest from Epson.
Rebooting Zorin.

Research:
Malfunctioning printer has later firmware than working printer.
Similar sounding cups problem has been described as " the upstream bug which has been raging for four years ....."

A possible solution to something that looks similar is given at

But my skill level is "monkey see - monkey do, if there are really clear cookbook instructions that a monkey can follow".

Would trying that solution out on my Zorin Lite install be advisable?

2

Yes, I see nothing dangerous in those steps. If it does not work, you can backstep to revert it.

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Further research: LM MATE and XFCE 20.3 also fail to print on that specific printer.
Whereas LM MATE 18.3 succeeds.

4

That makes it sound like the latest package of CUPS is the culprit...
You might try downgrading to CUPS=2.1.3 to test it on a later distro...

5

Downgrading CUPS looks to be way beyond my skill and interest level.

Probably will cannibalise bad printer for its good print head and scrap the rest of it - it was never a good egg.

6

It's exactly as easy as installing it.

sudo apt install cups=2.1.3

Though this works just as good.:wink:

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