Hi,
@CaseySJ
I got an interesting result today.
I tried not to connect USB 2.0 cable to flashed GC-TITAN RIDGE v1.0
then Ultrafine 4K can 100% successfully Display in cool Boot in some condition.
However, there are still some problems:
1. Thunderbolt 3 Recognize Problem
--Thunderbolt 3 devices information about Ultrafine 4K won't show up in System Info->Thunderbolt/USB4 until replug the thunderbolt cable.
--This situation also happened after sleep.
2. Sound and Brightness Control Problem
--Warm boot is still necessary to ensure that sound and brightness control are functional.
--However, sound and brightness will lose function after sleep.
3. Cable Problem
-- Apple Thunderbolt 3 (USB‑C) Cable (0.8 m) can successfully turn on Ultrafine 4K in cool boot.
-- Ultrafine 4K Original USB-C Cable (1.5 m) can turn on Ultrafine 4K in cool boot.
-- Ultrafine 4K Original Thunderbolt 3 Cable (2 m) can't turn on Ultrafine 4K in cool boot.
Presumption
-- USB 2.0 port on GC-TITAN RIDGE plays an important role in functions of thunderbolt monitor.
-- If the cable supported DP-Alt mode, it can lit up Thunderbolt Monitor in cool boot without USB2.0 connected to GC-TITIAN RIDGE.