Yesterday, I did a full reinstall of Lubuntu on my laptop. I was on 20.10 and I’m now on 21.10. Everything seems to work well, except that Firefox causes major issues. It frequently freezes, and cause the whole computer to freeze also soon after. It freezes for 2-10 minutes, then unfreeze for 30 seconds to 1 minute, then freezes again. When Firefox is minimized, there’s no problem.
In the meantime, I installed Chromium to be able to use the web and post this message. Chromium works fine, including being able to watch videos.
I suspect an issue with the graphic drivers because it seems to happen mostly when I try to watch a video. In Lubuntu 20.10, in there was a way to install nvidia drivers but that options is not available in 21.10.
Installing that driver solved a lot of issues on this laptop (for example: it allowed to use Suspend without causing the laptop to freeze on black screen).
Computer: Macbook Pro mid-2009 (laptop)
RAM: 8 GB
Storage: Samsung SSD 250 GB
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 21.10 Release: 21.10 Codename: impish