I downloaded the ISO and put it on a USB stick. I couldn’t see the stick to boot it in bios UEFI mode but did in Legacy. Shortly after the upgrade started (from Leap 42) there was an error relating to UEFI/Legacy which i dismissed and it continued on. Now when I boot i get
Loading 'Linux 5.3.18-40 - Default
Error can’t find command 'Linux
Loading initial ram disk
Error can’t find ‘initrd’
If your 42.3 was using UEFI booting, then your best option would be to find out how to boot the installer in UEFI mode, and then repeat the upgrade. That will likely fix the booting problem.
This thread is tagged with “LEAP 15.1”. And you also have “LEAP 15.1” as part of the title.
Your opening post says “Loading 'Linux 5.3.18-40 - Default”.
That is not the kernel for Leap 15.1. It might be the kernel for the alpha test release of 15.3. Or perhaps it is a kernel for Leap 15.2 (but not the current kernel).
This suggests you have been testing other versions, and somehow you are trying to boot the wrong version.
I’m mentioning this, because perhaps that will jog your memory and hint at what might be going wrong.
My apologies for the error. The boot screen shows the options:
openSUSE Leap 15.3 Alpha
Advanced options for openSUSE Leap 15.3 Alpha
Start bootloader from a readonly snapshot
When I select the snapshot option, it lists 8 options. The first is 'openSUSE Leap 15.3 Alpha (5.3.18-102.2021-01-16T04.post.afterupdate). The second is ‘openSUSE Leap 42.3(4.4.180-102.2021-01-16T03:52.pre.beforeupdate’ and I am able to boot it. It does provide some capabilities.
Boot the installed system however you are able to the most recent version you can make boot (via chroot if necessary), then, using code tags around your paste, paste here “somefile.txt” generated thus:
Upgrade from Leap 42.x to Leap 15.3 is not supported.
Leap 15.3 is in alpha stage, use Leap 15.2 instead.
Perform fresh install.
If you want to keep /home, clean /.cache folder after install.
Hmmm… and I thought I was making progress. After the last post I plugged in a new stick and was able to make a UEFI bootable drive with 15.3 and finished the upgrade. Boots just fine now, but I can’t get the wifi to work. YaST says "Nerwork is currently handled by NetworkManager or is completely disabled. YaST is unable to configure some options ".
I’m doing this via my phone so any output is cumbersome to transcribe.