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Lenovo E470: no HDMI output (Catalina)


Vonjy

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The iGPU properties injected in @Vonjy's Clover config are odd and contradictory:

  1. device location is incorrectly entered (though it probably works due to values being <10)
  2. framebuffer port count set to 2 yet there's a patch for a 3rd one

iGPU_Prop#1.jpg

iGPU_Prop#2.jpg

iGPU_Prop#3.jpg

 

This needs be revisited and configured with correct syntax and meaningful parameters:

1) iGPU device location

PciRoot(0x0)/Pci(0x2,0x0)

2) iGPU properties

AAPL,ig-platform-id        00001659        DATA
device-id                  16590000        DATA
framebuffer-patch-enable   1               NUMBER
framebuffer-stolenmem      00003001        DATA
framebuffer-fbmem          00009000        DATA
framebuffer-unifiedmem     00000080        DATA
framebuffer-con1-enable    1               NUMBER
framebuffer-con1-type      00080000        DATA     // but this is usually to support HDMI audio, not HDMI per sé

3) SMBIOS

Check whether MBP14,3 is more appropriate than MBP14,1.

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