How to Activate Thunderbolt Bus on Alpine Ridge without Flashing Custom Firmware

i0ntempest

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Hello, any news on this? Also is this only for Alpine Ridge (not Titan Ridge) cards?
 

EliteMacx86

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kyoung

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I can report success on my Lenovo Yoga 720 15-iKB Intel JH6540 Alpine Ridge 4C using edited SSDT-TbtOnPCH from here

IOREG and SSDT Attached.

Thunderbolt bus loads:
- Without TB Device at boot
- After one cold boot
- After two or more restarts from Apple Menu
- After sleep/wake cycle
- After hot plug.

Tested Working:
- Brydge/Henge Stone Pro TB3 Dock
- DisplayPort 1.4 to HDMI 2.0 Adapter (requires one sleep/wake cycle to turn on)
- Thunderbolt passthrough port
- TB3 Dock Audio
- Thunderbolt Ethernet between two macs
- Target Disk between two macs
- Clamshell mode

Issues:
- Requires two or more restarts or a cold boot to activate Thunderbolt bus.
- Requires one Sleep/Wake cycle to turn on display connected to TB3 Dock when Thunderbolt Bus is loaded.

Screen Shot 2022-09-21 at 10.18.40 AM.png

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1663809042079-png.5074
 

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i0ntempest

New member
Joined
Sep 20, 2020
Messages
10
Motherboard
Gigabyte Z390 Aorus Pro
CPU
i9 9900K
Graphics
Radeon RX 6800 XT
OS X/macOS
12.0.x
Bootloader
  1. OpenCore
Mac
  1. Mac mini
Mobile Phone
  1. iOS
I can report success on my Lenovo Yoga 720 15-iKB Intel JH6540 Alpine Ridge 4C using ThinkPad SSDT-TbtOnPCH from here

IOREG and SSDT Attached.

Thunderbolt bus loads:
- Without TB Device at boot
- After one cold boot
- After two or more restarts from Apple Menu
- After sleep/wake cycle
- After hot plug.

Tested Working:
- Brydge Stone Pro TB3 Dock
- DisplayPort 1.4 to HDMI 2.0 Adapter (requires one sleep/wake cycle to turn on)
- Thunderbolt passthrough port
- TB3 Dock Audio
- Thunderbolt Ethernet between two macs
- Target Disk between two macs

Issues:
- Requires two or more restarts or a cold boot to activate Thunderbolt bus.
- Requires one Sleep/Wake cycle to turn on display connected to TB3 Dock when Thunderbolt Bus is activated.

View attachment 5070

View attachment 5073

View attachment 5072

1663809042079-png.5074
Good for you... I wish it is possible for my titan ridge card.
 

kyoung

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i7-7700 HQ
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  1. OpenCore
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  1. MacBook Pro
Mobile Phone
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@i0ntempest There is a wealth of information in this thread.

Hopefully you can salvage something for your card 👍
 

EliteMacx86

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  2. MacBook Pro
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Good for you... I wish it is possible for my titan ridge card.
For Titan Ridge, flashing Custom Firmware is required. However, if you do not have any specific Bus usage, you can have the HotPlug without the Bus.
 

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