openSUSE Tumbleweed - grub2 installed in non-EFI mode

Last time after I've installed openSUSE Tumbleweed, I've got incorrect grub2 installation (but system instalation was successful). Instead of using EFI my grub2 was configured to run in the classic mode. After reboot I was able to see only the grub2 command line.

Here is the solution:

First we need to find our grub config file. We can do it using:

 > search.file /boot/grub2/grub.cfg

We should get something like:

 (hd1,gpt6)

Now load that config:

 > configfile (hd1,gpt6)/boot/grub2/grub.cfg

The grub menu should appear. Unfortunately entries were incorrect because of using e.g. "linux" command instead of "linuxefi". We have to change that, so press "e" to edit your entry. Next, change "linux" to "linuxefi" and "initrd" to "initrdefi".
To boot press F10.
After your OS is loaded open YaST, then go to Bootloader settings and change mode to "GRUB2 EFI". Done!