Score:0

How do I install my Canon CanoScan LiDE 20 scanner to Ubuntu 20.04.3 LTS 64-bit?

jp flag

I purchased a Canon CanoScan LiDE 20 scanner in the middle of 2005.

At the time, I had a 32-bit computer with Microsoft Windows XP 32-bit installed on it.

Now, I have a 64-bit computer with Ubuntu 20.04.3 LTS 64-bit installed on it.

I can't scan with my Canon CanoScan LiDE 20 scanner using this installation of Ubuntu 20.04.3 LTS 64-bit.

I would really appreciate it if somebody could please provide me with instructions to install my Canon CanoScan LiDE 20 scanner on Ubuntu 20.04.3 LTS 64-bit so that I can scan with it.

I'm new to Ubuntu so I won't understand how to install this scanner if steps that more experienced users of Ubuntu take for granted are missed.

Thanks a lot for any assistance you can provide.

heynnema avatar
ru flag
This is a USB device, yes? Is it plugged directly to a computer USB2 port? Edit your question and show me `lsusb`. What application have you tried to scan with?
Score:2
it flag

Many device access problems can be resolved through group membership changes.

You can find the device name by watching sudo journalctl --follow as you connect your device. OR ls -1 /dev >dev.before, connect the device, wait 10 seconds, ls -1 /dev >dev.after;diff dev.{before,after}.

Specifically, if ls -l shows that the group permissions (the second "rwx" triplet) is "rw" (e.g."-rw-rw----"), then, adding oneself to the group that owns the device will grant rw access.

Here's how:

device="/dev/whatever"
sudo adduser $USER $(stat -c "%G" $device)

This allows you membership in the group that can rw the device, but there is one more step.

To make all your processes members of the new group, logout and login. Group memberships are set up at login time.

To create a single process in the new group (for testing, prior to logout/login):

newgrp $(stat -c "%G" $device)  

or, just type the group name. See man newgrp.

Andrew Mackinnon avatar
jp flag
I've forgotten my manners. I'm sorry. Thanks a lot for this assistance that you've provided to me. May I please ask you if you are saying that you believe that I should be able to get my 32-bit Canon CanoScan LiDE 20 scanner working with any version of Ubuntu 64-bit into the foreseeable future? Is is possible that forces beyond my control may prevent me from doing this? Rightly or wrongly, if I can't get this perfectly good 32-bit scanner (in immaculate condition) working with Ubuntu 64-bit, then I'm not going to use Ubuntu 64-bit. I'll go back to using Windows and LibreOffice.
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