I have an issue with my Plasma laptop. I woke it from hibernation, did a backup (to the NAS upstairs), then updated it. When I was finished, I logged on, started Terminology, and issued a mount -a command as usual, but got an error telling me that my NAS couldn't be found.
This had happened twice before this update, but it had fixed itself the first time. By the time I checked with Dolphin, the shares were mounted. The second time, I did a power down instead of a reboot after the update, and the NAS shares were mounted with no further drama. This time, it failed following the post-update reboot, and three subsequent power-downs did not resolve the problem.
As with the previous occasions, all the installed and updated applications seem to work fine, such as Vivaldi, on which I'm now typing this, and it appears not to have affected other DEs. My identical Xfce laptop updated normally, and had no problem mounting my NAS shares, so it appears to be a Plasma issue. I'm going to change the Plasma laptop to Unstable, and see whether that changes anything.
If that doesn't help, no worries. I can simply not depend on accessing the NAS from my usual laptop for a while. After all, I can use Xfce instead of Plasma - both laptops are configured identically. The Xfce machine doesn't have working Bluetooth (unless something's changed that I haven't noticed yet), but I can use wireless peripherals with dongles with it.
As before, my VirtualBox VMs are unaffected - even the Plasma VM. I have no trouble doing a backup on that VM, then an update, and afterwards rebooting and connecting with my NAS. I suspect the difference is in the kernel they're using, compared with the host machine.
This is already a long message, so I'm going to post it for now and try some of the possible remedies I've mentioned. As I've already said, no worries. I have multiple ways to work around this problem, so I'm going to explore some of them now. Cheers for now ...