Lenovo Flex 2-15 - External HDMI (or dual monitor) not working - HD4400 - Haswell

[maxzero110]

Hello,

I am running macOS Big Sur Version 11.6.1 (Build 20G219), OpenCore 0.7.2

My system specs are:

Lenovo 2-15

CPU: i7-4510U
RAM: 16GB
GPU: HD4400 - Integrated GPU only


I am attempting to enable the HDMI port for external display (or dual monitor.) On Catalina, I did have AirPlay however, it is no longer working since upgrading to Big Sur.

What I have tried:

- Official OpenCore Guide
- WhateverGreen's Intel iGPU Patch Guide

Audio functionality is intermittent.
Wifi & BT are functional.

Please find attached config.plist as well as IOReg file.

Thanks.

Kind regards,

 

[Feartech]

Hello,

I am running macOS Big Sur Version 11.6.1 (Build 20G219), OpenCore 0.7.2

My system specs are:

Lenovo 2-15

CPU: i7-4510U
RAM: 16GB
GPU: HD4400 - Integrated GPU only


I am attempting to enable the HDMI port for external display (or dual monitor.) On High Sierra, I did have AirPlay however, it is no longer working since upgrading to Big Sur.

What I have tried:

- Official OpenCore Guide
- WhateverGreen's Intel iGPU Patch Guide

Audio functionality is intermittent.
Wifi & BT are functional.

Please find attached config.plist as well as IOReg file.

Thanks.

Kind regards,

sometimes using SSDTime may help:

GitHub - corpnewt/SSDTTime: SSDT/DSDT hotpatch attempts.

SSDT/DSDT hotpatch attempts. Contribute to corpnewt/SSDTTime development by creating an account on GitHub.

github.com

 

[maxzero110]

I tried to dump DSDT and then compile it however, DSDT does not seem to compile using the dump.

Edit: AirPlay was working on Catalina.

What else can I do here?

I did use the HDMI port to connect to the TV found, PciRoot info. Will this help in any way? Thanks.

 

[maxzero110]

Additionally, iasl response to dump compiling attached.

 

[Feartech]

Additionally, iasl response to dump compiling attached.

hackintool can dump your dsdt