Totu Docking Station & Catalina 10.15.6
I can confirm similar issues on my Totu docking station. My issue is when I close my lid, all monitors shut off. Not just the laptop monitor.
Prior to installing DL Manager, I was using Release: 5.2.4 of the USB Graphics Driver. It had other issues and I had hoped that moving to DL Manager would resolve this.
Currently, I have to keep my laptop monitor cracked open in order to use the external displays.
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