So I just installed Ubuntu 18.04 on my school laptop (HP Probook 450 G5) and for some reason it would automatically rotate the screen 90 degrees left. I tried adding a startup program with the command
xrandr -o normal
But it didn’t help. It only fixed it if I ran the command manually still the login screen was rotated. Well I found a solution.
sudo systemctl stop iio-sensor-proxy.service sudo apt-get remove iio-sensor-proxy
This works great and I haven’t had an issue since. Thanks