HOWTO: Configure a Plugable USB-VGA-165 (DL-165) display adapter in Debian 12 (Bookworm) using libre drivers

Over the past few weeks, I ve been expanding my two-screen setups into three-screen setups — a laptop plus two external monitors. Because I thought I only had one display port (HDMI), I went searching for USB display adapters. (I just realized today that my ThinkPad T470 has a USB-C / Thunderbolt 3 port that I ve [ ]