I'm upgrading my T460s Skylake from 16.04 to 16.04.2, and I'm running into this modal window stating that the system is running in low graphics mode. I've already tried running update/upgrade in a tty1 session. Also, tried reinstalling gdm and then lightdm. What can I do to fix this?
Well, its seems it was easier than i expected because I missed a step. I followed this article first before doing any kind of research.
sudo apt-get update sudo apt-get dist-upgrade
Edit: I may also expand on this... to get to the tty1 session to run these commands press CTRL+ALT+F1 and then login once you get to that modal window.