Why Canonical used kernel 5.8 on Ubuntu 20.04.2 instead 5.4 kernel?

Asked by Piotr on 2021-02-17

Dear Launchpad Community,

Why Canonical used kernel 5.8 on Ubuntu 20.04.2 instead 5.4 kernel ? I have information that 5.4 kernel is long supported to 2025 year.

5.8 kernel now is not supported. I found information on the wikipedia that the date when this ended support was November 2020 so why Canonical used this to the newest software? I think that better way was to use 5.10 kernel which have support to 2022 year.

Can you explain me? If 5.8 kernel is not supported I think that is not the best use now Ubuntu 20.04.2. I am right? Can I use 20.04.1 instead 20.04.2 and have the newest update? How I can do updates without migrate to kernel 5.8?

Yours faithfully,
Piotr

Question information

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Status:
Solved
For:
Ubuntu Edit question
Assignee:
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Solved by:
Manfred Hampl
Solved:
2021-02-21
Last query:
2021-02-21
Last reply:
2021-02-19

This question was reopened

Manfred Hampl (m-hampl) said : #1

Read the documentation

https://ubuntu.com/about/release-cycle
https://ubuntu.com/kernel/lifecycle
https://wiki.ubuntu.com/Kernel/LTSEnablementStack

The 5.10 version of the kernel will most probably be rolled out to Ubuntu 20.04 LTS when Ubuntu 21.04 is published (in April 2021).

When installing from the 20.04.2 iso file, you will get the newest available HWE kernel (5.8).
When installing from the 20.04 or 20.04.1 iso file, you will stay on the 5.4 kernel, and the update-manager will do all other updates (including showing the release number increase to 20.04.2 and higher)

Piotr (peterq94) said : #2

I readed these articles on Ubuntu websites but this doesn't answer for my question. The newest kernel is 5.9. Why Canonical don't include this on Focal? Kernel 5.8 is not supported now by Linux Foundation so it's dead. I know that system have support from Canonical but from the Linux Foundation is dead. It is not logic.

Manfred Hampl (m-hampl) said : #3

"The newest kernel is 5.9."
This is not true, see https://www.kernel.org/ there is 5.10. and 5.11

See the Ubuntu documentation https://ubuntu.com/about/release-cycle#ubuntu-kernel-release-cycle

Ubuntu brings a new version of the kernel only with a new Ubuntu release.
Ubuntu 20.10 was published when 5.8 was the stable kernel version and so it has that kernel.
At the time of publication of Ubuntu 21.04, probably the kernel version 5.10 will be the stable one.
There is no Ubuntu release between. So why should Ubuntu package the 5.9 kernel version?

Piotr (peterq94) said : #4

Thanks Manfred Hampl, that solved my question.

Piotr (peterq94) said : #5

From my information (google) kernel 5.9 was relesed 11 October 2020. Ubuntu 20.10 on 22 October 2020 so this could have 5.9 kernel but I think that this is only 11 days difference so is logic than Canonical can't compile system through 11 days. This solved my question. Thanks.

Piotr (peterq94) said : #7

I installed today focal and I had issues. I installed 20.04 and this works fine but I did update by terminal (apt). This download 5.8 kernel and my system was broken. I had a lot of bugs and I must power off my computer (reset). During this update my system broken totally. Session was broken, terminal stop working and graphical environment too so I am very dissapointed.

You told me: "When installing from the 20.04 or 20.04.1 iso file, you will stay on the 5.4 kernel, and the update-manager will do all other updates (including showing the release number increase to 20.04.2 and higher)"

So this was my mistake that I did updates by terminal instead graphical update-manager? Maybe this was problem? I think that update-manager will also download new kernel.

So it is a question --> How I can do update by terminal without download HWE (new kernel release)? Do you know?

Manfred Hampl (m-hampl) said : #8

With respect to 5.8 or 5.,9 kernel in Ubuntu 20.10 see https://discourse.ubuntu.com/t/groovy-gorilla-release-schedule/15531
There are certain cut-off dates and "kernel freeze" was on October 8, 2020

There is no difference between doing package updates via graphical update-manager or via command line.
Which iso file did you use for installing?

Piotr (peterq94) said : #10

I installed with 20.04 iso because I have burn out DVD disk with this system. This was iso from official Ubuntu website. I also checked with GPG and this system was okay, not corrupted.

So I installed 20.04 then I did update by terminal (apt command) to 20.04.2 because I can't see option to update to 20.04.1 with 5.4 kernel. Is it possible to update from 20.04 to 20.04.1 by terminal? If I want to have 20.04.2 but with 5.4 kernel it is possible?

Manfred Hampl (m-hampl) said : #11

What was the filename of the iso file?

Piotr (peterq94) said : #12

I don't remember but like I said this was Ubuntu 20.04 LTS. This was first release of focal. Now I can't see this iso on Ubuntu website. I don't have iso file in my drive. I can only tell you what is name of the disk:

DISKNAME Ubuntu 20.04 LTS "Focal Fossa" - Release amd64

Best Manfred Hampl (m-hampl) said : #13

for further details about kernel updates see https://answers.launchpad.net/ubuntu/+question/695636

Piotr (peterq94) said : #14

Thanks Manfred Hampl, that solved my question.