The latest version of Ubuntu Noble Numbat is coming, and many will be tempted to upgrade as advised on the ask-ubuntu site. I would warn anyone trying to do this to hold off for now. Although Noble Numbat itself is getting there, only a fresh install of 24.04 works for now. Currently on 21 February 2024 using sudo do-release-upgrade -d will likely brick your machine. I've tried the upgrade on several different models (all Lenovo) with fresh installs of Ubuntu 22.04 upgraded to the latest versions of everything and the do-release-upgrade -d crashes either at tracker-extract or, if you manage to disable it, at networkd-dispatcher. The machine freezes during the upgrade and can't be reused after that. I had to copy all my files off onto an external drive and reinstall everything. The strange thing is they had the same problem with 20.04->22.04, but somehow they fixed it. I wait for the corresponding update for 22.04->24.04.
Update 4 April 2024: Now sudo do-release-upgrade -d does nothing. It says "There is no development version of an LTS available". So it looks like they are preventing people from running the upgrade while it is known to be broken, but haven't fixed it yet.
Update 17 April 2024: sudo do-release-upgrade -d is back! I tried this on a clean install of 22.04, fully upgraded, rebooted, and ran the do-release-upgrade -d. It welcomes you to Ubuntu 24.04, but still fails. The laptop is still bricked and is unusable after that. The crash file in /var/crash says it was in netplan.script. So I guess this is still a library incompatibility between 22.04 and 24.04, related to networking.
Update 30 April 2024: Upgrading in two steps, from 22.04 to 23.10 using sudo do-release upgrade then once that upgrade is complete, you can upgrade to 24.04 using sudo do-release-upgrade -d. Even though the process got stuck a couple of times on one model of laptop, after retsrting it was possible to pick up where the installer had left off and so the laptop was not ruined. In the other cases, the dual upgrade went smoothly, but took about an hour overall.
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