When I hit abort: Internal error. Please report a bug report with logs. Run save_y2logs to get complete logs. Details: Storage::Exception Caller /mounts/mp_0001/usr/share/YaST2/lib/y2storage/storage_manager.rb:217:in `commit' Log is now attached. When I continue: Installation proceeds and succeeds. Even the boot manager is working fine. So it's just an unhandled exception. Btw, I installed the very same snapshot (20180220) today also on my notebook (single boot), where I created the EFI partition myself (256 MiB) and got not no warning, nor an error. This means it looks like the error only pops up if the warning (less than 256 MiB) gets displayed as well.