I recently installed latest Solus on my new Thinkpad T490, but got freeze issues on a daily basis. It's getting really annoying. When freeze happens, mouse cursor is still able to move but everything on the screen is unclickable. The clock in the panel won't update anymore. I know it's a Budgie freeze, not a kernel panic, because the music app is still playing music just fine, and I can press CTL-ALT+F1 to go to tty1.
For the nvidia card, I disabled the nvidia card following instructions at https://github.com/xulongwu4/nvidia-optimus-manager