Linux Mint 21 Vanessa on main laptop

I used the GUI tool:

• sudo apt update
• sudo apt install mintupgrade
• sudo mintupgrade
  

This tool required/proposed to start a timeshift snapshot before upgrading.  I did create that configuration to store the snapshots on /media/luc/Sea1/timeshift/

Then it took quite a while to simulate/download/perform the upgrade.  It also removed some "non official" packages like the Belgian EID stuff and maybe some other Debian or Ubuntu packages (I don't remember which ones).  But finally ended OK and reboot was fine (no need to reinstall Grub or anything like that).

UrBackup agent still alive and kicking.  Darktable version unchanged (3.6.0).  Multi-head monitor configuration still OK.

Ubuntu 22.04 LTS on backup server

• do-release-upgrade ran on 25/10/2022
• After quite a while, upgrade finished with positive message
• Reboot: no need to reinstall grub this time (yeah)
• Piwigo still OK under DynDNS and HTTPS (but see remark about PHP below) so mysql still OK too.   
• UrBackup server still alive and kicking after the upgrade.
  
• however : PHP was upgraded from 7.4 to 8.1 and the apache2 configuration didn't get the message so apache failed to start.  Thus:

luc@kid2:~$ sudo a2dismod php7.4
Module php7.4 disabled.
To activate the new configuration, you need to run:
  systemctl restart apache2
luc@kid2:~$ sudo a2enmod php8.1
Considering dependency mpm_prefork for php8.1:
Considering conflict mpm_event for mpm_prefork:
Considering conflict mpm_worker for mpm_prefork:
Module mpm_prefork already enabled
Considering conflict php5 for php8.1:
Enabling module php8.1.
To activate the new configuration, you need to run:
  systemctl restart apache2