View & edit pane does not scroll anymore

Hi there,

Beginner here, and I am not sure if this is the place but I really need some feedback.

My Obsidian 0.11.5 application under Ubuntu (actually Ubuntu 20.04.2 LTS) has become so buggy as to be unusable. This started after something in my system was updated.

The view and/or edit pane will not scroll anymore: no reactions to either scroll wheel on the mouse, dragging of the sidebar, or the cursor directed by the keyboard (in the latter case, the cursor just moves out of the window and the pane stays put).

I suspect it may have started with an upgrade to my NVIDIA drivers (which was forced upon me by a nagging OS).

Does any of this sounds familiar to anyone? I have looked around on this forum but the only similar complaints I can find are quite old.