The solution you gave me didn’t work on the long run, (I use Youtube and TED videos a lot for my work) but I broke my system with tinkering and put back a Timeshift snapshot from before the Vivaldi update, updated the system and Vivaldi performs without problems.
I tried it on an old Intel/Nvidia laptop that has a quite old discretenvidia card (330m).
It didn’t work, but the reason (afaik) is the card is too old to have any working nvidia driver.
So I’ll keep using the Intel card on it…
I had a thought that might be useful like this: a pinned topic for new users with current known problems - for example choosing CD/DVD instead of USB during install, and it could simply be descriptions with links to posts with solutions so it’s easy to read. I’ve never seen any distro do this and I’ve always thought it would be useful. Any of us could add to it as time rolls on, but it needs to be pinned or where it can’t be missed - is this possible?