https://forums.suse.com/showthread.p...hlight=rtcheck shows that (despite other problems, that lead to that old question in the first place) the out-of-tree RT extensions test then would run successfully.
Are you able to open a service request with SUSE? This might be something they will have to look at. The technical product information page (https://www.suse.com/products/realti...l-information/) explicitly listsso "Kernel was not built with CONFIG_PREEMPT_RT=y" does sound strange.SUSE Linux Enterprise Real Time Extension is based on the 3.0 real time Linux kernel, and includes the open source community's latest real time patch set—preempt_RT—a set of patches that support preemption with adaptive locks, per device interrupt threads, and priority inheritance.
OTOH, some simple checks may help... you have rebooted the system after installation of the add-on and verified that the correct kernel is used (according the the release notes, the RT kernel should be used anyhow, but it won't hurt to check)? Were / are there any packages that might need installation to supply the out-of tree extensions? (As you may have already guessed, I'm not that familiar with the RT add-on, so pardon any silly-sounding questions ).