(Dell laptop) Bootable USB works with Kubuntu 20.04.4 LTS, not with Kubuntu 22.04 LTS

[RichardR]

Hello,
I recently installed Kubuntu 20.04 on a Dell XPS L502X laptop with 8 GB RAM and a 250 GB SSD drive, and apart from some problems with nvidia packages, it has worked OK.
Now I want to do a test install of 22.04 LTS on the same machine, so I got the ISO (and of course checked it), and created a bootable USB drive.

However, when I start up the laptop with this USB drive, it will not boot. The BIOS recognizes the USB flash drive as a storage device, but I always get the message 'Operating System not found', no matter what I try.

The exact same USB drive boots just fine in the exact same laptop when I write the Kubuntu 20.04.4 LTS ISO to it, so it would appear that there is something strange going on with the '22.04 ISO.

I also tried several ways to create this bootable flash drive with '22.04, including the dd command, but nothing works. All these different methods work just fine with the '20.04 ISO.

Does anyone have an idea what may be the problem here? Or is there something fundamentally different about the way that 22.04 LTS boots compared to 20.04?

Thanks in advance,

Richard

[claydoh]

Some older legacy BIOS systems are not able to boot the 22.04 image, so I guess your 2011 machine may be hitting this bug.

Info with informational links and how to create a working image with mkusb:
https://askubuntu.com/questions/1406...tead-of-a-bios

Or upgrade from 20.04.

[RichardR]

OK, the problem you point to is indeed identical to mine. I will try the upgrade path, since it only affects this one laptop. My desktop machine (with UEFI support) can boot the flash drive just fine -- although the option 'Try out Kubuntu' has a different problem: when loading, the Plasma desktop crashes and hangs indefinitely. But I'll first try to figure this one out myself before complaining here :-)

Thanks for the quick and very accurate suggestion of what was wrong!

[oshunluvr]

Another solution is to download and install the "legacy" version of Ubuntu Server. You can install it without a desktop, then install "kubuntu-desktop" and you're up and running.