Kubuntu 21.04 fails to install

[vanadiumboy]

If you know how to report these problems on a web site where they can be addressed, then please do so.

I made an account on


launchpad
and added my comment on


https://bugs.launchpad.net/ubuntu/+s...r/+bug/1930880


I recommend that you do the same.

[GreyGeek]

Increasingly, ISO's burned onto USB sticks, when booted, check their own files before moving on to the the grub menu or Live desktop.
I prefer mksub to burn ISO's to thumb drives. A couple days ago I burned the latest KDE Neon to a 2GB USB stick and then booted into it. It ran through the file check list and all passed. I had also downloaded KDE Neon's publickey.gpg, installed it (gpg --import publickey.gpg), and then used Dolphin to check the 256sum against the downloaded sig file.

[jglen490]

While it seems that DVD install can work, USB thumb drive mostly works for most people.

The CLI program sha256sum, and manually comparing the checksum with the "official" checksum, always works.

There are burners that work in Windows and in Linux, such as Etcher.

[gh4wi]

I have not posted the DVD problems to any other website.
Problem #1 = Kubuntu 21.04 DVD is not able to run Live install, but the iso can be used to install from USB Thumb drive.
Issue is NOT the DVD hardware, as other distros can be created and used on the same hardware.

Problem #2 = Brasero can NOT verify DVD's .

If you know how to report these problems on a web site where they can be addressed, then please do so.

[Ed G8BQR]

Hi jglen490 & vanadiumboy,
I have checked the sha256 using GtkHash = same as site. Incidentally GtkHash had to be installed (from the Muon package manager) in my case, should anyone else need to find it, handy programme :-)

I have tried Kcompare on extracted Ubuntu and Kubuntu 21-04 iso, but Kcompare doesn't like the directory complexity, and there are too many differences - I am completely at sea...
As the USB iso seems to work for others - this seems my own way forward, but I'd like to see the DVD issue fixed, especially as the Ubuntu DVD works - tidy minded :-)

Incidentally, is it possible to create an iso file from the DVD and check if it is the same as the downloaded iso - for an "end-to-end" verification ?
Regards, Ed

[vanadiumboy]

I used GtkHash (installed on a Kubuntu 20.10). It's missing feature, but it calculates the sha256 to
e705e84ed8fa820f1b7f4d286d24e0eb97561a5b2d47421bf7 ea0381103788b7

[jglen490]

By "verify", that usually means running some program to make sure the checksum for the downloaded image is what it should be. If you downloaded the image(s) from Kubuntu, then go back to the download site and click on the link that includes check-sum in the title. It will show the check-sum value and give you instructions on how to verify the downloaded image.

[Ed G8BQR]

So just a couple of questions. Did you verify the ISO images before burning to DVD/USB? What app did you use to burn the ISO to DVD/USB?

Hi jglen490,
If you meant me, thanks for the reply :-) I compared the 3 images with each other (Kcompare (I think) in Dolphin) on the grounds that if there was about 1 in 10 chance of an error then the chance of all 3 having an error was 1 in 1,000 (good enough for me), and the Ubuntu image was fine with one download.
Image burning for DVDs - K3b (Linux) + Windows Disc Image Burner (default in Windows),
and for USBs - Startup Disc Creator (Linux) and the default Windows programme - one 4Gb and one 8Gb

I'm now Duck-Ducking to find out how to recover the USB drives :-)
Regards, Ed

[jglen490]

So just a couple of questions. Did you verify the ISO images before burning to DVD/USB? What app did you use to burn the ISO to DVD/USB?

[Ed G8BQR]

Hi gh4wi,

I have encountered the same problem, with similar errors in attempting to install K-21-04 from DVD.

I had also created 3 DVDs from 3 downloads, 2 on Linux and 1 on Windows.

In addition, I also created a DVD of Ubuntu 21-04 - this worked fine, both live and for installing.

Perhaps someone might check any differences between the two, and know what to do ? (beyond my competence, I fear !)

I also tried to burn the K-21-04 image onto 2 USBs, but hey both failed to install the OS, and also became inaccessible.

( First attempt to do this, so I?m probably not doing it correctly, as others seem to get it to work )

I am persisting, as an old problem with Mesa has been corrected in this issue - works fine now in Ubuntu 21-04, one step forward, 2 back ;-)

Opening Kate in Ubuntu gives a peculiar window text - this was a bit of a surprise as K is Ubuntu underneath and I expected the join to be seamless (?), so installing Kubuntu software into Ubuntu (which I had considered) probably fails :-/

Hope the Ubuntu helps, Regards, Ed

Update - K-21-04 install succeeded (eventually) using USB image, Happy now :-) Regards, Ed

[vanadiumboy]

I created a DVD of Sparky Linux on the same equipment which was used to create the Kubuntu 21.04 DVD.
The Sparky DVD boots and activate the Live installer ok...and installs ok.
Brasero could not verify the Sparky DVD either, as there was no Checksum file created.
So it looks like the K-21.04 DVD creation is a bust.
Strange since the K20.04 DVD works.

Did you report the problem to their bugzilla?
I think the rest of us have to upvote it so that it gets noticed.

[gh4wi]

I created a DVD of Sparky Linux on the same equipment which was used to create the Kubuntu 21.04 DVD.
The Sparky DVD boots and activate the Live installer ok...and installs ok.
Brasero could not verify the Sparky DVD either, as there was no Checksum file created.
So it looks like the K-21.04 DVD creation is a bust.
Strange since the K20.04 DVD works.

[claydoh]

Yep... That's the same problem that I see & reported .
Thanks for adding your info as well.
Perhaps some smart developer can address this issue.

They won't see anything reported here. Ubuntu devs don't hang out here unfortunately.

Sent from my LM-V600 using Tapatalk

[gh4wi]

Yep... That's the same problem that I see & reported .
Thanks for adding your info as well.
Perhaps some smart developer can address this issue.

[vanadiumboy]

DVD's are nice to have for old PC's that can not boot from USB Thumb drives.
As time goes by, one must stop using old media (5" Floppies, Jaz Drives, Hard drives, Magnetic tape, CD-Rom Drives, and now it seems DVD's are obsolete.
All of my PC's us either SSD, Compact Flash, or a few HDD for the OS.
I still use 3" Floppies, CD-Rom & DVD Drives, and USB Thumb drives to move files around.
The good news is that my PC's do NOT use paper tape !!! (Chuckle)

It?s ok if Kubuntu 21.04 no longer supports DVD drives/DVD discs.
I?m fine with that.
But how am I suppose to know that Kubuntu 21.04 no longer supports DVD drives?
The previous version supported DVDs.
It would help people if they write on the page that DVDs are no longer supported.

Keep in mind that many people won?t come to this forum and make an account and type out the error message. It?s too much of a bother.
***It gives the impression that Kubuntu is buggy software***

I wrote the ISO to another DVD-RW.
I tested the disc on 2 other machines, completely different motherboards, CPUs, DVD drivers.
One of them says
[FAILED] Failed to start Snap Daemon.Card State... submit kernel crash signature
[FAILED] Failed to start Ubuntu live CD installer.

One of them says
[FAILED] Failed to start Modem Manager.
[FAILED] Failed to start Snap Daemon.for details.d submit submit kernel crash signature
[FAILED] Failed to start Ubuntu live CD installer.