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Re: Printer configuration failed due to missing filters

From: Tobias Geerinckx-Rice
Subject: Re: Printer configuration failed due to missing filters
Date: Thu, 02 Dec 2021 14:18:39 +0100


Daniel Meißner 写道:
Printer 'EPSON-...' requires the
program but it is not currently installed. Please install it before
using this printer.

Interesting here is that it's looking in …-cups-2.3.3 where I believe it should look in …-cups-server-bin instead. The former is merely the upstream CUPS package, whilst the latter is a union of CUPS with its extensions (drivers).

Can you confirm that the file printed by

 $ ps auxwww | grep -o '/gnu/store/[^ ]*cups-files.conf'


 DataDir /gnu/store/…-cups-server-bin/share/cups
 ServerBin /gnu/store/…-cups-server-bin/lib/cups


You should find lib/cups/filter/epson-escpr-wrapper under this ServerBin.

Looking in the system profile I cannot find it: ‘find
/run/current-system/profile -name "epson-escpr-wrapper"’ shows no
results.  There is also no cups directory under
/run/current-system/profile/lib.  Am I missing something?

Just that there's no reason for epson-escpr-wrapper to be anywhere in /run/current-system in the first place. It should be in the union directory I mentioned above, and CUPS should find it there.

I don't currently have access to an Epson printer, but I'll try to add one anyway.

See if you can divine any useful chunks from the puddle of vomit that CUPS produces when configured with:

   (log-level 'debug2)

There's also (access-log-level 'all) but it's probably not relevant here.

Kind regards,


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