Created attachment 658244 [details]
yast logs

I installed Leap to my workstation (Dell Precision Tower 5810).
The BIOS (latest version, A09) is set to Legacy Boot Mode.
I reused the existing partition table (gpt_sync_mbr), but removed former
partitions, and newly added a boot and root partition (ext4).

With these settings the disk was configured like this:

Number  Start   End     Size    File system  Name     Flags
 1      1049kB  272MB   271MB   ext4         primary  legacy_boot
 2      272MB   27.1GB  26.8GB  ext4         primary

This resulted in the following behaviour:
On reboot, system gets reproducibly stuck with the "Invalid Partitiontable !"
Error. However, if one hits "Return", it will boot into grub2, and into the
system afterwards.

It turned out, that the DELL bios is just missing a normal "boot" flag (btw.
doesn't matter on which partiotion on that disk).

The following disk configuration boots flawlessly:

Number  Start   End     Size    File system  Name     Flags
 1      1049kB  272MB   271MB   ext4         primary  boot, legacy_boot
 2      272MB   27.1GB  26.8GB  ext4         primary

So we should set "boot" flag (at least in addition), if there's no reason to
set "legacy_boot" (only) in this case.