Kubuntu kernel version

[Shlomo Solomon]

I recently read that Ubuntu 20.04 has upgraded from kernel 5.13 to 5.15 

Although I regularly run:
sudo apt update;sudo apt upgrade;sudo apt autoremove;sudo apt clean
to keep my system up to date, I was still on 5.4
uname -r
5.4.0-122-generic


I downloaded and ran ubuntu-mainline-kernel.sh and was asked if I
wanted the latest kernel. After rebooting, I got:
uname -r
5.19.0-051900-generic


Since that seemed strange (5.19 and not 5.15), I found and ran the
following:
sudo apt-get install --install-recommends linux-generic-hwe-20.04
This installed the expected 5.15. 
Part of the output was:
Setting up linux-generic-hwe-20.04 (5.15.0.43.46~20.04.14)


But after rebooting, I'm still on 5.19 - I assume because this is a
higher version and the GRUB entry was not removed.

2 questions:
1 - Is it normal that sudo apt update; sudo apt upgrade left me with a
5.4 kernel? It has been upgraded over time, but not to 5.13 and 5.15.

2 - Is there a problem having 5.19 instead of the recommended 5.15 and
should I uninstall it?




-- 
Shlomo Solomon
http://the-solomons.net
Claws Mail 3.17.5 - KDE Plasma 5.18.5 - Kubuntu 20.04