Experimental code ready for testing to enable HDMI 2.1 FRL with AMDGPU on Linux
https://www.gamingonlinux.com/2026/02/experimental-code-ready-for-testing-to-enable-hdmi-2-1-frl-with-amdgpu-on-linux/Open linkView original on aussie.zone154
Comments13
Yep, fr fr
bonjour!
Bruh, just bought an DP to hdmi adapter a few weeks ago lol. This is good news regardless though, hopefully this hdmi mess is finally going to get fixed at some point.
Does this get HDMI CEC working?
Don't think so. It's currently focused on 4:4:4 colour at high bandwidth (4k@120hz), HDR, and VRR.
Isn't CEC proprietary and effectively some form of DRM?
I believe you're thinking HDCP.
CEC is actually implemented in Linux Kernel and you can use it (on supported hardware) with cec-client. So I'm not sure about being legally proprietary, but it's part of the HDMI standard since 1.0 (thus, if you support it, you support CEC too) and it's not at all a DRM.
no instructions how to install and use it :(
Later edit: I think you have to compile the whole Linux kernel with the patched amdgpu driver. The GitHub repository for it is linked in the article: https://github.com/mkopec/linux
Edit: I shouldn't comment before reading the article.. This whole comment is irrelevant. Keeping it up for posterity.
End-users generally use the amdgpu driver in the Linux kernel. When it's ready, it'll be merged into the kernel and your next kernel update will have it. If you're on a gaming-targeted distro, they usually get kernel updates pretty fast, so you won't have to wait long after it's ready.
Or TL;DR: do nothing, keep your system up to date, you'll get it eventually!
I can get 5k widescreen 120 on windows, only 1440p 60fps on linux, is this going to help with that?
Possibly. If you have the option to use DisplayPort instead of HDMI, that should also resolve it today.
I think it also depends on what distro you're using. On Linux Mint Cinnamon, which still uses X11 by default, I haven't been able to use the highest refresh rate of my monitor. But the experimental Wayland support did it without issue.
I've gotten 280 fps with matching refresh rate on Linux and X11, as well as Wayland. All using DisplayPort of course. Works great.