Reposting:
First: I am still running the 24.04.3 LTS on my day-to-day working laptop and will most probably stick to it until the next LTS
On an alternative laptop, I proceeded with a clean install of 24.04.3 LTS and did all the upgrades up to 25.04. This took less than an hour in total. I then had to wait for the upgrade to 25.10 to be possible.
For about a day the option to upgrade to 25.10 did show on the GUI, but nothing was proceeding when choosing it.
Then it appeared (as the standard reminder) and I choose to proceed… but before the end I got a message that there was an error (i.e. Upgrade 25.10 has an error and should stop) - It said the upgrade was halted because of too many errors. I clicked for the details, but nothing was showing; I clicked the ‘send’ option anyway.
When rebooting, I got a black screen with some white lines which appeared for only half a second… no upgrade. I had to restart. On the reboot, I got through to the password page, the pointer (mouse arrow) was showing, but no desktop, just a black background.
I just figured, why not another try…. And it did boot up to the desktop… didn't figure what happened. I tried to upgrade from the terminal this time around. I saw an error with libcanberra-pulse which could not be upgraded. In the meantime and from my working laptop I searched the web about it. So, I did manually “apt-get remove libcanberra-pulse”.
I did reboot up to the desktop. Seemed fine.but with a ‘missing packages’ icon in the panel. I got about 10 different ‘update’ notice since then. Probably the system updating itself for what was missing, since the ‘missing packages’ icon disappeared from the panel after the 2nd such update.
Looks good now… lets see.
W