Monitors are connected to docking station by DVI connectors. Basically computer can't be logged in/started if connected to docking station before powering it on. Bios password shows ok, the texts before forementioned phase scroll ok on other external monitor until two blue screens without any texts and jam there.

Have to say graphics feel a little better and stable also with the 64-bit install on this HW platform.

$ dpkg --print-architecture
i386

Shite... So maybe darktable only available as 64-bit?? And maybe I have to install 64-bit devuan..? Can this installation be easily upgraded to 64-bit with some gimmick?

/etc/apt/sources.list file

# deb cdrom:[Devuan GNU/Linux 5.0.1 daedalus i386 - desktop 20230914]/ daedalus non-free-firmware non-free main contrib

deb http://deb.devuan.org/merged/ daedalus main

deb http://deb.devuan.org/merged/ daedalus-updates main

deb http://deb.devuan.org/merged/ daedalus-security main

deb http://deb.devuan.org/merged/ daedalus-proposed-updates main

I have written also daedalus-proposed-updates repo to synaptic as all else also that is shown in instructions.
checked the /etc/apt/sources.list also with txt editor and it is ok...

Tried also apt update and apt policy darktable from terminal.. Does not find it from terminal or thru synaptic.

Checked also lscpu if system/installation is 64-bit and it should be cabaple running 64-bit software..

How about if it is not available to intel i7 hw architecture from repo??? Says something about amd64 on those screenshots?

How to add non free if it contains non free parts, but shouln't non free soft be included in deb.devuan.org/merged daedalus main ??

Thanks for help all. Got printing working.

system-config-printer was allready installed.

Accidentially powered on the printer after usb was connected first and hplip setup popped up. Wen't like aluma said after that.

Also added the printer then from GUI setup and test page/scan review were succesfull.

Thank you all for the fast help.