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Re: Guix Printing Problems

From: Efraim Flashner
Subject: Re: Guix Printing Problems
Date: Thu, 23 Sep 2021 15:16:49 +0300

On Thu, Sep 23, 2021 at 09:30:44PM +1000, Peter wrote:
> Greetings! This is my first post. I hope I'm doing it right, and please 
> forgive me if I'm not.
> I have installed GUIX (including CUPS) onto a Lenovo ThinkCentre P520c, 
> successfully except that I cannot print from within the Guix installation. I 
> have a trusty Brother HL-5350DN laser printer connected via ethernet to my 
> local network. Pointing the browser to http//:localhost:631 brings up a CUPS 
> interface, but produces an error message: "The web interface is currently 
> disabled. Run "cupsctl WebInterface=yes" to enable it." I try that but 
> "command not found". Commands I have used like 'systemctl start cups.service' 
> etc don't work on Guix either. Is there a Guix equivalent? Attempts to enable 
> the Web interface via the config.scm (GNU Guix Reference Manual 10.8.7) have 
> also failed.
> And yet: if I type the IP address of the printer '' directly 
> into the browser, it shows up as ""; and 
> I find myself in a Brother utility for the printer, from which I can 
> successfully do a test print. The Brother utility has a number of screens: 
> Home Page, View Configuration, Maintenance Information, Find Device, Printer 
> Settings, Administrator Settings, Reset & Test, Network Configuration.
> This ought to be encouraging, but when I attempt to print a working text 
> document (e.g. via Gedit) although the printer is listed (along with IP 
> address and all usual data) it says "Processing - Not connected?", despite 
> the system clearly knowing the address etc.
> I set the printer up normally in Gnome Print Settings, but if I look at the 
> View Print Queue, it says "Document Print Status: Processing - Not 
> connected?". If I go into Server Settings to check the 'Publish shared 
> printers connected to this system' setting the troubleshooter recommended, I 
> get "CUPS server error: There was an error during CUPS operation: 'Failed to 
> set settings'". Troubleshooting's final verdict is "There is no obvious 
> solution to this problem."
> I'm foxed, and frustrated, and as a desperate work-round I have to ssh the 
> file to another machine to be printed. By the way, I have successfully set up 
> printing for MacOS, nixOS, Debian, and Arch, but GUIX (alone) fails to find 
> the printer, except via the Brother utility.
> Any clues? I earnestly want this FSF-endorsed distribution to work.
> I'm including my config.scm, and the troubleshooting report.

Try adding yourself to the 'lp' group, under supplementary-groups. I
have myself added to the lp and the lpadmin group, I can never remember
which is the correct one.

Efraim Flashner   <>   רנשלפ םירפא
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