Yast Bootloader fails to load Leap 15.5 DVD on a Leap 15.3 system

Running Leap 15.3. Trying to install 15.5. Have burnt a 15.5 Install DVD. When I reboot, the DVD drive engages, then stops, and the existing Leap 15.3 screen appears. No option to boot from DVD. Am I doing something wrong, or am I trying to do the impossible (I don’t want to wipe my system if I don’t have to).

I would check the ISO checksum to make sure it’s correct. If you put the DVD in the booted system and mount it, do you see the 15.5 files on it?

Also check the boot order in your BIOS/UEFI. CD/DVD must be before HDD/SSD.

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I see all the files I expect. Checksum is -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)


Please ignore the line returns in the above posting.

This is what I think is going wrong. And as far as checking the boot order displayed from the BIOS, I must confess to being a Clueless User. I haven’t found anyway to modify it (and boot from DVD is not offered as an option). Since I never throw anything away, the instruction manual must be somewhere in my pile of stuff I never through away.

What you posted was the GPG signature rather than the checksum - for the downloaded ISO, you can run:

sha256sum -c <filename>.iso.sha256

And compare the output to the ISO’s sha256 checksum downloadable from the website (the checksum is signed so you can verify that it hasn’t been tampered with if you choose).

As for changing the boot order, that’s generally done from the BIOS or system firmware - usually the system will show “press del for setup” or something like that before you get to the OS selection menu (grub2). Some systems use F2, F12, Esc, or Del for that (might be something else). In that configuration, you’ll usually find a ‘boot order’ option and can select the DVD as a boot option.

Some systems also let you press a different key to get a menu to select what device to boot from.

Current Brainstorm: Do I need to create a new partition on my hard drive so the installer can see where to put the Leap15.5 files (as I type this, it seems more and more like this is what my issue be)???

There are different ways to install Linux or Test it. I you have a spare USB-Stick we definitely recommend to use that for speed.

When you turn on your computer press the aforementioned keys to enter your BIOS and change the boot order. DEL / F2 / F12 / F9 / F8 one of these keys should either give you a boot drive selection or let you enter BIOS. There you would need to find the menu for boot order. Choose optical drive /DVD and move it to the top, that should allow your to boot from DVD. Or for any other drive you wish to use.

That won’t prevent the DVD from booting. Indeed, the 15.5 disc can be used to upgrade your existing installation (though from 15.3->15.5 is something that’s not recommended, it’ll do it).

Your system’s just not booting the disc, and it’s likely because the hardware boot order is not set to boot from DVD before the hard drive.

First of all, I want to thank everyone who quickly responded to my question. For 30 years, I was the *nix expert in my workgroup, but we always had another group responsible for the o/s, and I’ve never had to resolve this issue before.

You are correct. It took a while to figure out how to get to my motherboard’s boot sequence, (was unable to force the installer to do it) but once I did, and set it to look at the DVD drive first, I was able to get the 15.5 disk to launch. Am I correct in thinking that I will end up with a single 15.5 installation, and not a dual-boot situation?

If you accept all defaults, probably yes, but there’s no reason to do that unless it’s what you want. The installer can do most anything you could reasonably think to want. Most limitations are limited to existing Windows installations. If 15.3 is using the whole disk now, you should be able to have the installer shrink 15.3 - if its freespace is adequate. If enough freespace for 15.5 already exists, simply direct the installer to use it. If there’s a particular partition arrangement you wish, either create it yourself, or use the installer to create it so.