Hi Malcolm, thanks for support.

Code:
linuxSLED:/home/hans-christoph # blkid
/dev/sda2: UUID="ef477c07-44f4-4f7b-a864-2e3db8ab1da5" UUID_SUB="4beb56de-ab60-493f-a58d-fbfaa80d71e1" TYPE="btrfs" PARTUUID="9b3964d6-99a7-4709-b03b-d74b5616e956"
/dev/sda1: SEC_TYPE="msdos" UUID="1134-FED2" TYPE="vfat" PARTUUID="64ed5ad8-cd97-44e6-9bf8-5d34bdaa60a5"
/dev/sda3: UUID="e1659cee-7914-425d-b343-17172a04b02a" TYPE="swap" PARTUUID="6960820f-3102-4297-8deb-bbedb9bc3238"
/dev/sda4: UUID="32d4acc6-dff1-44fc-87f1-078867c6bc18" TYPE="xfs" PARTUUID="0cba231d-53e0-4b24-b2eb-56ecc1e52bab"
linuxSLED:/home/hans-christoph #
This number I found in DISKS as well for Swap:
UUID="e1659cee-7914-425d-b343-17172a04b02a"

My impression is X-Windows doesn't start. I had that before.