Problem with CUPS request for user name and password rejection when trying to setup an Epson Printer on Linux Mint ?

747spokes · 04-10-2023, 07:22 PM

I've just installed Linux Mint 21.1 and am trying to install an Epson WF2750 printer. I cannot get past the Common Unix Printing System (CUPS) section where it asks for my user name and password. I know my username and password for this install of Linux Mint is definitely correct but the CUPS system refuses to accept it so I cant proceed with the installation. The panel where the user name and password is requested simply repeats its self with the data boxes that I have typed in the correct user name and password empty. I expect this has been covered before in this forum but I cannot find it. I dont want to use windows any more if I can avoid it and all that I have read about Linux is that it is far superior. I just want to learn how to use it!! Could some kind person help with an easily understood explanation of all the steps that I need to take. Thankyou. PS cant find a similar thread.

ferrari · 04-10-2023, 09:08 PM

Perhaps this thread will be of help...
https://forums.linuxmint.com/viewtopic.php?t=356026

ferrari · 04-10-2023, 09:39 PM

Also, perhaps check that the user is a member of the lpadmin group first

Code:

groups

then the primary user should be able to set up a printer without admin credentials.

https://unityconstruct.org/uc/node/960
https://www.fosslinux.com/61850/how-...-on-ubuntu.htm

747spokes · 04-11-2023, 05:25 PM

Hi Ferrari, thanks for your replies but still struggling to get the job done. However I found that by simply connecting the printer with a usb cable to the Linux Mint laptop the printer is recognised and seems to be installed. However it does not print correctly - only black and no colour. Maybe there are correct drivers for this printer, Epson WF2750, to run correctly, including its scanner capability, when connected to Linux Mint and not windows? Regarding the username and password problem with the CUPS facility - what is this root user name and password that is mentioned. Sorry to be a bit dense. Also are you saying that I should be a member of the lpadmin group whatever that is??

ferrari · 04-11-2023, 06:35 PM

Quote:

Originally Posted by 747spokes

Hi Ferrari, thanks for your replies but still struggling to get the job done. However I found that by simply connecting the printer with a usb cable to the Linux Mint laptop the printer is recognised and seems to be installed.

Yes, udev makes that happen "automagically" when the USB-connected device is plugged in.

Quote:

However it does not print correctly - only black and no colour. Maybe there are correct drivers for this printer, Epson WF2750, to run correctly, including its scanner capability, when connected to Linux Mint and not windows?

We can investigate that. With the printer connected, run the following commands

Code:

lpstat -t

Get the driver (PPD) info using

Code:

sudo egrep -i "name|model|filter" /etc/cups/ppd/*

and share that output here. Please enclose the output within [code]...[/code] tags (or refer to the '#' button in the advanced forum editor). That should provide enough info to determine if the correct driver is in use.

Quote:

Regarding the username and password problem with the CUPS facility - what is this root user name and password that is mentioned. Sorry to be a bit dense.

Some distros have a root user account set up, but Ubuntu distros and its derivatives don't employ this approach. They use the sudo approach instead.

Quote:

Also are you saying that I should be a member of the lpadmin group whatever that is??

Yes, if you want to be able to be a CUPS administrator. Then providing your user credentials to CUPS when necessary should be sufficient.

BTW, the CUPS admin group is defined here...

Code:

grep -i sys /etc/cups/cups-files.conf

747spokes · 04-21-2023, 06:06 AM

Hi Ferrari, Sorry to have not been in contact since your gratefully received advice. However I still could not get past the user name and password problem that I was having when trying to progress via CUPS. In the meantime I found on another forum called ubuntuforums.org where at following address I found the correct code to paste into the Linux Mint command screen and to my amazement the driver etc seemed to download and install itself and I then found that I have my WF2750 printer installed and working ok with all black and all colours!!

https://ubuntuforums.org/showthread.php?t=2349479

The code that I inserted is as follows: sudo apt-get install printer-driver-escpr

After I had installed the software the Linux listed the printer as follows: Epson Inkjet Printer Driver (ESC/P-R) for Linux. I also found reference to EPWF-2750 Series PPD Driver version 1.1

I've no idea where the driver was downloaded to but anyway at leaset it seems to be doing the job. For anyone else looking for a driver for the Epson WF2750 running in Linux Mint that code is all that is needed.
Thanks again for your help. I am wondering where I can find a driver for the scanner function of the same printer.
Regards, Simon.

beachboy2 · 04-21-2023, 09:39 AM

747spokes,

Go to:
https://www.epson.co.uk/en_GB/suppor...ected-os=Linux

Linux Scanner Driver > Accept > Package Download Page > select deb 64-bit

epsonscan2-bundle-6.7.43.0.x86_64.deb.tar.gz

Open the above with Archive Manager > Extract > Extract > Close.

If the folder is on Desktop, install the deb package using:

Code:

cd Desktop
sudo dpkg -i epsonscan2-bundle-6.7.43.0.x86_64.deb

747spokes · 04-21-2023, 01:21 PM

beachboy2 many thanks for your rapid response. I will try this.

747spokes · 04-22-2023, 05:08 PM

To beachboy2. Again thanks for your advice. I went to the epson website https://www.epson.co.uk/en_GB/suppor...ected-os=Linux and followed through with your instructions. Finally getting to the point of pasting the code <sudo dpkg -i epsonscan2-bundle-6.7.43.0.x86_64.deb> into the command screen of my linux mint installed operating system. But that is as far as I can get. Ive put the extracted software in its folder on my desktop. But the response is always the same with the statement that: dpkg: error: cannot access archive 'Desktop/epsonscan2-bundle-6.7.43.0.x86_64.deb' No such file or directory.
or a slightly different version: dpkg: error: cannot access archive 'epsonscan2-bundle-6.7.43.0.x86_64.deb' No such file or directory.
I have attached a photo of the linuc mint command input screens results of a couple of attempts to install.
I expect that I am making some sort of amateurs mistake and I wonder if you can correct me. Thanks.

beachboy2 · 04-23-2023, 02:38 AM

747spokes,

Sorry about that.

Right click on that deb folder on your Desktop and click on "Open with other Application".

Highlight "GDebi" and click on "Open".

EDIT:

Another way is:

Code:

cd Desktop
cd epsonscan2-bundle-6.7.43.0.x86_64.deb
sudo ./install.sh