Now that I've used the catalina patcher tool (which is great, and pretty easy to use, along with a great instructional video to go along with it) and got catalina running on the mbp, the display link adapter (USB32HDPRO) will not work. Drivers are downloaded and installed properly, but the external monitor's display just shows a solid, bright yellow color. I followed the driver installation guide, I checked the FAQ, and searched the "knowledge base". I double checked everything (connections, etc.). I installed displaylink's helper tool, and sent the results back to display link and they're not much help at all so far.
They question the monitor... which makes no sense - I've used the monitor up until this issue, and I'm using it right now with a different laptop.
The monitor is detected by displaylink manager, it's supposedly 'sending frames' and the 'screen is recording' (according to the log files I sent displaylink support). If I click "gather windows" while the mac's "display settings" windows are open, it gathers the window from the external display's area (samsung monitor) and brings it over to the macbook pro's screen, *and* it shows the options relating to the samsung monitor too (eg: color profile, etc.). So it does "see" the monitor. It's just not displaying the picture. Just yellow.
Could this have anything to do with any of the patches (backlight,...? anything?).