Not every time, but too frequently, my laptop's display goes wonky when unplugging from the HDMI cable. The background goes black (instead of my selected image) and everything is about 3/4 size, with the right quarter just black. While I still have use of the cursor, clicks don't align with the icons. The only fix I've found -- other than rebooting -- is to plug the cable back in and let the monitor sync. I sometimes have to re-plug and unplug multiple times before everything is back to normal on the laptop's screen. I have an LG Gram, model 17Z990-R.AAS7U1 with Intel UHD Graphics 620 (WHL GT2), running Budgie.