ubuntu 21.04 DVD

https://packages.ubuntu.com/hirsute/jigdo-file
https://packages.ubuntu.com/hirsute/jigit - tools for working with jigdo files
Install from the command line or Synaptic package manager.

1. Hi why did not ubuntu\kubuntu have one Disk images with possible to reinstall bootloader, or fix issue?

You can reinstall the bootloader with the standard Ubuntu installation disk image.

2. Why did you have blueray image?
https://cdimage.debian.org/debian-cd/current/amd64/jigdo-bd/

The link that you gave is for Debian, but here is the question area for Ubuntu.
You are wrong here. Ask at a Debian Forum.

I ask for Ubuntu why did you have more tools buy default? same with fedora its very boot live DVD but other use install disk with other fix tool if some get wrong?

Please rephrase your question, we cannot understand what you are asking.

I understand that your mother tongue is not English (neither is mine), but most of your questions are unintelligible.
I suggest that you use an automatic translation tool (e.g. translate.goole.com) and translate your last texts back into Norwegian language. Does this really make sense there?

The best way for creating a bug report (which mostly is also valid in this question area) is the following:

Provide the information:
1. What did you do?
2. What do you expect to happen?
3. What happens instead?

Vennligst omformuler spørsmålet ditt, vi kan ikke forstå hva du spør.

Jeg forstår at morsmålet ditt ikke er engelsk (det er heller ikke mitt), men de fleste av spørsmålene dine er uforståelige.
Jeg foreslår at du bruker et automatisk oversettelsesverktøy (f.eks. translate.goole.com) og oversetter de siste tekstene dine tilbake til norsk. Er dette virkelig fornuftig der?

Den beste måten å lage en feilrapport (som for det meste også er gyldig i dette spørsmålsområdet) er følgende:

Gi informasjonen:
1. Hva gjorde du?
2. Hva forventer du å skje?
3. Hva skjer i stedet?

Issue for me i did not find any distribution without good support and easy to fix:

With support and without issue?

I find a issue in linux mint not sure if ubuntu have same issue:
https://gitlab.gnome.org/GNOME/totem/-/issues/461
But i find out that is nvidia issue with package, nvidia is out of support if some issue its there, same with other programs.

So i install kernel 5.12 find out its may broked all nvidia drivers with all kernel.

I guess same may happed with 21.04 if i try same there? can you confirm what gold for ubuntu is?
Because its hard to user find any soulution for this.

Because i try to ask linux mint chat but they say only way to fix it up its to reinstall everything and take backup first?
Ubuntu\mint have same design but ubuntu 21.04 is newer so will kernel 5.12 mess up ubuntu 21.04?

I can not waste to much of my time, but did not find any other that may give this issue?

You agree that if some get wrong with linux its no easy fix same with windows 10.
I hope you make linux more easy and give list of know bug before upgrade maybe remove package that know mess up system?

Did not find any know issue with linux kernel unity but its not big risk like beta or alpha to upgrade kernel? most time its works without issue.

because issue here is kernel 5.12 i thing make nvidia drivers unsable, is may be issue with xchat and other things, so i did not know what case this but its did not works to boot older kernel, so its make nvidia not possible to load?

Because APT-get install did not works not to reinstall its install both amd64 package and i386 so i think its very unormal.

What is the question here?

There is no support for the 5.12.* version of the kernel in Ubuntu yet. If you install unsupported software, then we cannot help you, but you have to help yourself.

Are you aware that kernel modules (e.g. nvidia.ko) may have to be recompiled if you install a different version of the kernel?

but how to be award about that if i use ubuntu own nvidia driver setup, can someone add kernel 5.12 script to the https://itsfoss.com/install-additional-drivers-ubuntu/ i guess its config that missing.

Your comment #8 does not make any sense.

https://itsfoss.com/install-additional-drivers-ubuntu/ is about installing drivers and not about installing kernel version 5.12.
The word "kernel" does not appear on that page at all.

For the strategy about kernel versions in Ubuntu releases please see https://ubuntu.com/kernel and the pages linked from there

https://www.linuxuprising.com/2018/10/2-utilities-to-install-latest-kernel-in.html

But what did sence did its make?
https://www.nvidia.com/Download/driverResults.aspx/174582/en-us
nvidia have more updated drivers, but its not very easy to install run files, i get 'kernel-source' or 'kernel-devel'most be installed before upgrade it.

Please read the first two paragraphs in https://www.linuxuprising.com/2018/10/2-utilities-to-install-latest-kernel-in.html#warning

I have used google to translate it into Norwegian. Maybe you understand it better:

Før du installerer noe, bør du vite at det vanligvis ikke er en god ide å installere en hovedlinjekjerne på din Ubuntu-maskin. Disse kjernene er bygget fra de nyeste Linux-kildene, uten Ubuntu-oppdateringer eller andre modifikasjoner, og støttes ikke.

I tillegg bryter installasjon av en kjerne fra Mainline Kernel PPA vanligvis proprietære drivere eller ut-av-tre-moduler, som de proprietære Nvidia-grafikkdriverne, Broadcom trådløse drivere, VirtualBox dkms-modul og så videre. Som et resultat kan datamaskinen din starte opp til en svart skjerm, du kan oppleve tilfeldige frysninger, og / eller WiFi kan ikke fungere etter installasjon og oppstart til en hovedlinjekjerne.

I did not case about warranty issue or not, i have tryed to make email to:
<email address hidden> Tony George and <email address hidden> that have made it or developed it.

I did not have issue with black screen yet, but i think its possible to fix someway.

With all distribution its risk to get poor system or issue with.

Ubuntu its more upgraded than debian, but not like upgraded as opensuse tumbleweed

As 21.04 its released did not mean its failt free but its less risk for big issue than Beta or RC.

can you also tell when and why gnome 40 did yet before ubuntu 21.10 get released or can it be tested before?

I am sorry, but do not understand your questions any more. How is gnome 40 (comment #13), nvidia (comment #10) and kernel version 5.12 (comment #6) related to the Ubuntu 21.04 install DVD (initial question)?

Its can be added or not? sorry but i did not think you developer or contributer manager is very professional.
If you want i make more question but did not think i get good answer more.