I have no idea why this just started tonight, but I was playing a linux game in steam and noticed I couldn't view discussions or anything as the sidescroll bar just keeps popping up and down the page. I can't even grab it and control it. So I got out of steam and noticed same thing happening in Firefox. So I rebooted and same thing. I tried researching but most of the time I can't read entire pages as it keeps shifting me back to the top and down to the bottom. I did find this link after one person said it could be graphic drivers and am trying to update via this ppa: https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers. But doing so in terminal, I get all updates except a message saying "holding back" on mesa-va-drivers. I have continued to sudo apt-get update & upgrade with nothing else showing as needing updating. However, my sys tray shows updates available and going into Discover they show as needing to be installed. But it never asks for my password (a recent issue so I just keep updating in terminal) so the updates hang and I have to close out of the app manager. I am very new to this and have Ubuntu 18.04 bionic with KDE Plasma. I am on a laptop with Intel i7 6th gen 8 gb ram, nVidia gtx 965m and intel 500 graphics. I am not using the touchpad and only use my mouse which has worked perfectly until tonight.
Any help would be greatly appreciated. If I need to provide more info, please advise.