If installing off the 2-2019 Gremlins ISO there are things that differ from the original post. At time of writing this post 3/31/2019 I installed plasma two days ago for the sake of fresh notes.
Once in LXQT desktop (and on cabled internet) open terminal
sudo pacman -R artix-lxqt-presets commman-openrc cmst connman xcursor-breeze
sudo pacman -S plasma sddm networkmanager-openrc kde-applications
kde-applications and network manager are options however plasma wont install with xcursor-breeze and artix-lxqt-presets installed as they conflict with breeze.
After all that installs
sudo rc-update add netowkrmanager default
sudo rc-service networkmanager start
For printing
sudo pacman -S cups-openrc
sudo rc-update add cupsd default
sudo rc-service cupsd start
Now the plasma tray dialog for printers should allow you to choose one instead of showing red x. It may require one to log out and back in or to reboot. Adding printer dialog allows one to choose by model. Hover over each one to see all models that the driver covers. If no luck on your model of printer move on to next step and try the same there
For scanning
sudo pacman -S sane-openrc
sudo rc-update add saned default
sudo rc-service saned start
Most linux distros wont handle these files as they are license intensive so we look to the AUR for this. First we install tool to gain access to AUR.
sudo pacman -S yaourtix
yaourtix -Sy
sudo yaourtix -S iscan-plugin-network
Use yaourtix to search your printer from previous step if needed. Here is where to start if your model is not found:
https://wiki.archlinux.org/index.php/CUPS#Printer_Drivers
Depeding on the model of scanner instructions from here may differ. I have an epson wf610 so I looked here:
https://wiki.archlinux.org/index.php/SANE/Scanner-specific_problems
While rebooting you may notice that greeter screen is still from lxqt
Two ways to edit at this point. Use KDE file manager dolphin to navigate to /etc/sddm.conf
or
sudo nano /etc/sddm.conf
KDE will ask for your password (if you installed kde-applications) when you save the file.
In the top few lines we need to change
to read
If using nano: ctl+o to save. ctl+x to exit.
Mandatory menu icon change:
right click on "start" menu icon. Choose "configure application menu" Click on icon box or square -> choose -> click circle for "other icons" -> browse -> Root file system on left /usr/share/icons/artix/logo.svg
click ok and apply.
If you need sysmon on desktop and are lazy
sudo yaourtix -S conky-colors
Read the readme.md as there are many options to configure and launch for different results. More:
https://github.com/helmuthdu/conky_colors
If you wish to have graphical package manager and tray icon for updates:
sudo pacman -S octopi octopi-cachecleaner octopi-notifier-frameworks octopi-pacmanhelper octopi-repoeditor
Open settings tab on octopi and go to AUR and check box for yaourt and it seems yaourtix gets tied in to graphical octopi. Now you have tray notification on updates.
Cell phone integration:
sudo pacman -S kdeconnect
This one little app is wonderful for those of us who need to stay connected and constitutes my reasoning for using kde.
AKA I have a GF with high anxieties. Not sure for ios but android users go to play store and install kde connect. On opening screen click on all the bottom items as they are permission setting. If you want the full bore allow all and you will enjoy some neat integration between cell phone and Artix. Remote mouse, file share, clip board inserting, rely to texts and emails and more. In KDE from application menu go to Settings -> System Settings scroll left pane down and select KDE Connect. Click on instance in middle pane, probably "google" if not renamed. Now you will see all the options for computer side. If a masochist once can elect to send computer notifications to the phone. This area is useful for sending a ping to the phone or ringing it if you happen to have lost track of its location.
optional cleanup
sudo pacman -R lxqt
Other than what is listed above I did nothing more to bring plasma in and configure it for daily use. No involvement with keys or systemd-dummy packages. These may be decent delta instructions since the original poster used an older ISO.
I understand that many do not like KDE and I have mixed feeling as well. That being said its useful to have docs updated and current for anyone seeking answers.