My son fiddled with YaST > Bootloader under openSUSE 15.0, and somehow managed to make his ASUS laptop unbootable.
It is an EFI system.
It was a dual boot, windoze 10 and openSUSE 15.0.
That worked fine.
After that he was still able to boot from an USB stick (what was that he wanted), and installed Kali Linux on two empty partitions earmarked for that.
Now, when the Laptop is booted, the BIOS screen appears.
Not even windoze 10 boots.
Within the BIOS there is no option displayed to remove EFI boot entries.
So I guess there aren’t left any.
Or the EFI boot partition is broken.
Using GParted from a life Linux brings out, that all the 9 partitions (from EFI boot partition, windows partitions, openSUSE root and home, swap, Kali root and home) do still exist, so the partition table still is OK!
I tried: “Boot your machine from the installation media. In the boot screen, choose More › Boot Linux System.”, as described in https://doc.opensuse.org/documentation/leap/startup/html/book.opensuse.startup/cha.trouble.html
Well, fine, by that way, options to boot openSUSE and Kali are displayed alongside the right partition numbers.
So obviously, the systems present are recognized by the installer/rescue medium. In fact.
But booting them fails. For whatever reasons.
So, what I’m supposed to do?
Should I format the EFI boot partition, because it may be errorneous?
But what to do afterwards?
The text in
describing an alternative way to fix this problem for me isn’t helpful, because it leaves out too many details. I’m not a “Guru”.
Is there an easy way to fix that?
Many thanks in advance,