Like the users in the below linked post, I have observed increased battery drain during sleep depending on what adapters are installed. Here are my approximate numbers:
- No adapters, or only Type C adapters - 280mw
- Type A adapter (Framework or one that came with a phone) - 550mw
- HDMI adapter - 680mw
The additional power draw is undesirable, and since I only ordered 2 Type C adapters initially I have left 2 of the bays empty for the last while.
TCCOLD is the lowest power state TCSS is capable of, but it is an NDA case. The empty dongles/adapters still connect to the CC pin and will show up as a connect. I am wondering if it would work to create an adapter with a switch for the CC pin so that when devices aren’t in use they can be turned off, saving power. The Type A adapter should be no problem since I think it is just a pull-down resistor. HDMI might have additional concerns because I assume there are chips to convert DP to HDMI and to negotiate DP-Alt mode with the PD.
Would anybody like to weigh in on the feasibility? I have zero parts on hand so any prototype would take months to wait for parts to ship.