[Pre-Install] Unable to install Kubuntu on older hardware

[Nonne]

Hello good people, pretty much a complete linux noobie here in need of some help.

Im trying to install Kubuntu on my fairly old computer. Switching from being a long time windows user.

Running into some weird issues when trying to install. I made a USB bootable stick with rufus and it would just chill on complete black screen after selectin "try or install kubuntu". Tried several different linux distros (Ubuntu, fedora) and got simillar problems with them all. Tried too figure out how to turn of secure boot (which i realized my motherboard doesnt support) so i stopped trying to do that and just removed fast boot (inside windows) and checked some data-encryption stuff some people on google said might be the issue. Nothing helped they were all turned off. I asked chatgpt , and it said my motherboard is so old it might not support UEFI and recommended to try Ventoy, so i did.

Ventoy got me to the same place "try or install kubuntu.." but seemed to just hang on a black screen. Out of frustration i left it there and went to cool off for well over 20m and suddenly it started booting into the kubuntu installer and i managed to, i thought, install it. At the end though i got an error message stating:

Install Failed
"command apt-cdrom add -m -d=/media/cdrom failed to finish in 10 seconds. there was no output from the command"

i clicked ok or next or whatever it was and it seemed to still work and i finished the setup guide. When i clicked finish on it i got another black screen and nothing seems to happen. Pressing ctrl+shift+F1/F2 gives me a window with some text stating:

Timed out while waiting for udev queue to empty
[FAILED] Failed to start upower.service - Daemon for power management.

Worth to note, when i booted from Ventoy into the installer it briefly flashed by on the screen a text stating something in the line of "not a secure boot platform 14"*

What else i've tried
- Adding nomodeset, noapi (spelling?) and other variants to the file when pressing e on "install or try kubuntu". These dont seem to do anything for me, sometimes removing some GUI elements and shows me alot of text lines (Assuimg its showing me what the installation is preparing). But i probably havent tried all the variants, i was just fishing at this point.

- Gone through my motherboards UEFI (BIOS?) looking for secure boot, havent found it. Inside windows it said that it was unavailable and from googling it seems that the motherboard i have doesnt support secure boot.

My hardware:
Storage: 120g samsung SSD, 2x 1TB harddrives in raidmode (if that matters) and the USB stick (tried different USB sticks)
Motherboard: Asus P9X79 Deluxe
CPU: Intel i7-3930K
Memory: 32GB DDR 3
Graphics: AMD RX Vega 56

Any help would be greatly appreciated to get me into the linux world :3

[skyfishgoo]

if the bios does not support uefi then you need to boot to legacy mode in ventoy.

[oshunluvr]

#1 Most Important: You need to verify the ISO file you are booting to is not corrupted. You need to compare the ISO checksum before continuing. Assuming the IS is OK...

I would suspect a problem with BIOS or some other piece of hardware and kernel compatibility. It looks like there are BIOS updates still available on the Asus website but it appears you need Windows 8 to install them, and no guarantee it would make a difference. A 12 year old BIOS should still work with a modern Linux kernel, but not all BIOS are the same.

You can forget about secure boot, if it's not there it's not the problem and Linux doesn't require it.

The first thing to do is try and nail down what piece of hardware is causing the issue. I would start with "RAID mode" as you call it. Hardware (motherboard enabled) RAID is notoriously difficult to use and frankly, not a good idea at all. IMO it was only invented because the crappy file systems Microsoft uses and the Windows operating system don't support RAID natively.

The very first thing I would do is turn OFF the motherboard RAID and try booting to Kubuntu again using Ventoy. Report back if it allows you to boot Kubuntu properly. I assume anything you have on this computer that you want to keep is backed up somewhere. It's probable turning the RAID of will leave the existing file system unreadable.

Once you can boot to the Kubuntu ISO normally, we can talk about drive configuration and file systems before you install if you still want to use RAID.