I occasionally try packages from updates-testing. I decided to give kernel-6.4.1-3 a spin. Packages would not install.
Tried in the gui, just right click and choose open with installer and gurpmi froze after giving root password. So, I tried urpmi from konsole as root and it froze also. I've done this several times before with kernels and other packages without problems.
I had to run genhdlist2 on the directory, add it as a custom media, then install using add/remove software gui which worked fine.
Really strange...