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Warning to Linux users: Linux, depending on the kernel, checks the BIOS tables for the explicitly coded support as defined by the manufacturer meaning HDMI 2.0 may or may not work in your particular Linux distro. This is despite the fact that the hardware itself is more than capable. Details below:



No exactly true. There are physical requirements for various HDMI versions. The OEM has to validate the port for the version of HDMI they want to support. The driver checks the connector tables in the bios provided by the OEM to determine what connectors are present and what they support. Click to expand... The Linux driver since some months ago checks those tables, any refuses to utilize HDMI 2.0 features offered by the GPU/APU, even if they work just fine and the manufacturer was just too lazy to "validate" or to update his BIOS image.



Meanwhile the Windows drivers don't give a d*** about that BIOS table and HDMI 2.0 works like advertised for the affected GPUs.



This is clearly (like with ACPI-parsing for so many years) another case of "Linux kernel developers want to do 'the right thing' according to written specification", with just bad results for Linux users because neither Windows drivers nor the firmware follows the written specification. The Linux driver since some months ago checks those tables, any refuses to utilize HDMI 2.0 features offered by the GPU/APU, even if they work just fine and the manufacturer was just too lazy to "validate" or to update his BIOS image.Meanwhile the Windows drivers don't give a d*** about that BIOS table and HDMI 2.0 works like advertised for the affected GPUs.This is clearly (like with ACPI-parsing for so many years) another case of "Linux kernel developers want to do 'the right thing' according to written specification", with just bad results for Linux users because neither Windows drivers nor the firmware follows the written specification. Click to expand... Source:

https://www.phoronix.com/forums/for...-some-motherboards-bios?p=1008853#post1008853 Linux, depending on the kernel, checks the BIOS tables for the explicitly coded support as defined by the manufacturer meaning HDMI 2.0 may or may not work in your particular Linux distro. This is despite the fact that the hardware itself is more than capable. Details below:Source:

Fantastic news for Raven Ridge! Thanks to an adventurous redditor, it turns out that in at least one case HDMI 2.0 capability is, in fact, not dictated by the chipset but the processor. So some current first generation AM4 motherboards could, can, and do work with these Raven Ridge APUs, offering unhindered full specification HDMI 2.0 compatibility.That is where you fellow forumers come in: let’s test Raven Ridge APUs and see which first generation AM4 motherboards (especially ITX and mATX, since this is SFF.net after all!) can properly display 4K at 60Hz. I will update this post to list the compatible models as you share your results here. Thank you for your help and participation.