openSUSE:Reproducible openSUSE/Part2-graphics

This provides extra details for openSUSE:Reproducible openSUSE/Part2 about how to run a graphical environment from the built packages:

How to install KDE in that minimal VM:

qemu-img resize var/lib/altimagebuild-x86_64.img 10G
# give more RAM - e.g. 4GB
qemu-kvm -drive format=raw,file=var/lib/altimagebuild-x86_64.img -m 4000 -serial stdio -vnc :9

and in an extra shell:

gvncviewer localhost:9
zypper in growpart
growpart /dev/sda 1
resize2fs /dev/sda1
zypper in patterns-kde-kde # installs 1798 packages
useradd -m user
passwd user
systemctl enable --now display-manager.service

Unfortunately, the Plasma shell does not work yet, but KDE-applications run fine in icewm. See screenshots