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Tubardus

[Solved] Degraded HDMI output on Latitude 7490

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OK. I can already tell you that the second option didn't work. I changed the igplatform and the computer had some problems to boot. After that, the main display hasn't been recognized and the HDMI was off. I will now try the first option.

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Simple question. Do I need to put your config.plist instead of mine in the EFI and to reboot or must I find the code lines dedicated to HDMI in your file?

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I edited your file. So replace them or renamed them and place in /EFI/Clover

Keep your original as is. Rename the attached Config.plist to Config-1.plist, that way you have Config, Config-1 and Config-2

During boot, go to Options and select the different Config file to boot

Keep note of which one you're booting with

 

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Just add the HDMI patch even though HDMI connection works OOB, sometime it still causes issue you mentioned.

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I've tried several mods of layout ids (ig-platform-id) and/or SMBIOS without success. At the same time, I no longer have any HDMI audio output available so it's like HDMI is not recognised per sé. Time to look up the IOReg.

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Yup, that what it seems to be: IOReg shows DP connector type when it should be HDMI; could be the reason and there certainly can be no harm trying to inject HDMI properties again.

 

7490_FB@1_DP_type.jpg

 

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Spot on Jake. With HDMI connector-type properties injection, HDMI output is back to normal and HDMI-audio recovered.

 

IMG_2844.JPG

 

7490_dual_screen_HDMI.jpg

 

7490_FB@1_HDMI_type.jpg

 

 

I've updated the bootpack of my Latitude 7490 guide to that affect.

 

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