Linux Users Hit Resolution Wall Over HDMI Licensing
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Linux users can't achieve the highest HDMI 2.1 resolutions and speeds that Windows users can due to licensing restrictions.
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The HDMI Forum rejected AMD's proposal for an open source HDMI 2.1 driver that would enable features like 4K120Hz over HDMI on Linux.
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AMD has been trying to negotiate with the HDMI Forum to allow an open source driver for over 2 years, but was ultimately denied.
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The HDMI Forum charges high membership fees and has restrictive agreements, likely blocking open source implementations.
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DisplayPort, rather than HDMI, is now the best option for Linux users needing the highest resolutions and frame rates.