Select tool is lagging for me as well. The problem just started today and my production has since been halted while I search for solutions. I have checked and my graphics driver is up to date…so I will consider removing latest system updates although, from what I’ve read, this sounds like it is only a temporary fix and can be time consuming.
Problem is with SketchUp Pro 2018 (problem started with the 2017 version today…thought updating to 2018 would help, but no)
Device = Dell Latitude 5580 laptop
Display Adapters = Intel HD Graphics 630, NVIDIA GeForce 940MX
System = Windows 10 pro
Recent system updates = version 1709 on 11/15, KB4048951 on 11/16, KB4041994 on 11/16, KB890830 on 11/20
Any permanent solutions would be greatly appreciated!