Hello:

Hmm ...

Has it occurred to you that there's a reason for the existence of the Release Notes?
Think about it for a while, you may eventually grasp the idea.

I have noticed your not mentioning anyone putting a gun to your head to force you to install and use Devuan.
If, for whatever motive, it is not to your liking, I respectfully suggest you stay with Mint or choose any one of the many available options at your disposal.

Because [reasons] ...

*******************************************************************************
The main one being that it is how we do things here at Dev1.
*******************************************************************************

You may have not read the first few lines on the devuan.org web page:

I'd say that your questions about systemd are something you have to take elsewhere.

You may not notice but I am making an effort to be as polite as possible, so I will end this post in the following manner:

***********************************************************************************************************************************************************************************

I take exception to the tone in your posts as I consider them to be both unwarranted and out of place.
I would personally appreciate your showing more respect to the members of this forum and to those who volunteer their work to keep this site working.

***********************************************************************************************************************************************************************************

Thank you.

A.

Hello:

All parts are pertinent.

OK

You did not purge the previous HPLIP version before trying to install 3.19.5?

I have seen at least two posts on the web where it was said that the previous package had to be cleared out.
Can't find them now but I think you should do that.

Purge the installed version of HPLIP, reboot, make sure your installation is up to date and that there are no missing dependencies.

# apt autoremove --purge hplip

# apt update && apt upgrade && apt install -f

Reboot.
Now try to install the missing dependencies.

From your post I see that the HPLIP installer says it needs pyqt5 and pyqt5-dbus.
But when it tries to install them it bitches about pyqt4 and pyqt4-dbus and crashes.

Does not take into account the dependencies of the dependencies.  8^D

Let's try to install the missing dependencies individually, one by one via apt on the terminal.
Not via the HPLIP installer, evidently it is rather lacking.

ie:

# apt install pyqt4-dbus   <---- *first* the ones that are needed to be able to install the ones HPLIP says it needs
# apt install pyqt4

# apt install pyqt5-dbus   <---- *then* the ones that HPLIP says it needs
# apt install pyqt5

Then, just in case, check for other missing dependencies or updates.
ie:

# apt update && apt upgrade && apt install -f

Stop there (don't install HPLIP yet) and let us know how it went.

Cheers,

A.

Hello:

This is HPLIP from the Debian Bullseye repository.
As far as I understand it, it is not a backport.

Have you tried apt install -f to see if you could fix the dependency problems when installing HPLIP 3.19.5?

That's the only thing I can think of.

Cheers,

A.

Hello:

If they say so it is probably so.

Did you try fixing the dependency errors?

ie:

[root@devuan ~]# apt install -f

Sometimes it works.

Well ...   8^7

See here: https://pkginfo.devuan.org/

Have you tried installing the current ie: updated version for ascii?

Just for tidyness' sake, maybe it would be a good idea to uninstall and purge first before installing HPLIP version 3.18.12:

[root@devuan ~]# apt purge autoremove hplip

That's just Google being its usual silly and sucking up to its pals.

Cheers,

A.

Hello:

OK.

I think this has to do with CUPS not seeing the scanner and is asking for the hpfax backend to be able to do so.
I'd say that the hpfax backend is definitely related to the installation of the fax printer.

So ...
Is the HP-toolbox I asked you about installed?
If so, is the fax-printer installed?    <--- this seems to be the essential part.

Please check and read the link I posted.

Cheers,

A.

Hello:

Open a terminal and run the groups command to see what you are a member of:

user@devuan:~$ groups

If I recall correctly, you have to be a member of the scanner group to be able to use one.
If you are not a member of the scanner group, open a terminal, become root and add yourself to it:

[root@devuan ~]# adduser [userID] scanner

Log out and back in again and run the groups command to see if it worked.

Here's a link to a page by HP (!) for troubleshooting the scanner in the 8025.

Cheers,

A.

Hello:

Absolutely embarrased cannot describe how I feel.
My only excuse is not having had my café au lait when I posted.    8^*

Of course it should not be there.
And the original is exactly where it should be:

groucho@devuan:~$ locate sudoers
/etc/sudoers
--- snip ---

I think it was a left-over from when I was setting up the sudoers file, playing with visudo.
Somehow got created in /home/groucho, it is empty.

Thanks a lot for your input.

A.

Hello:

Indeed ...
As expected.  8^D!

OpenCL subsystem isn't available   <- it would seem that there is no such thing in your laptop.

Does your video card actually support OpenCL?
I think it probably does not.

See this table: https://www.notebookcheck.net/Quadro-FX … 598.0.html

but ...

The NVIDIA Quadro FX 380M is a newer card and supports OpenCL but the NVIDIA Quadro FX 770M (~ a year + five months older) apparently does not.

My advise is to remove the OpenCL driver which obviously does not work in your laptop.

Best,

A.