AMDGPU HDMI 2.1 FRL To Be Initially Disabled-By-Default
The AMDGPU driver has introduced HDMI 2.1 FRL support, although it will be disabled by default initially. Users will need to modify their Linux kernel boot parameters to enable this feature until Variable Refresh Rate support is implemented. Once VRR support is ready, the HDMI 2.1 FRL functionality is expected to be enabled by default.
- ▪AMDGPU HDMI 2.1 FRL support is now available in the latest driver iteration.
- ▪The FRL feature will be disabled by default until Variable Refresh Rate support is added.
- ▪Users can enable FRL by booting with the amdgpu.dc_feature_mask=0x400 parameter.
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AMDGPU HDMI 2.1 FRL To Be Initially Disabled-By-Default Written by Michael Larabel in Radeon on 20 May 2026 at 05:34 PM EDT. Add A Comment One of the most exciting developments in recent times for the open-source AMDGPU kernel graphics driver is HDMI 2.1 FRL support for the AMDGPU driver along with Display Stream Compression support as they work toward providing full HDMI 2.1 support for this open-source AMD Radeon driver. The details how AMD managed to pull this feat off given prior resistance from the HDMI Forum remains to be confirmed, but it's moving ahead and out today is the latest iteration of the HDMI 2.1 FRL+DSC patches. This sixth iteration of the HDMI FRL and FRL DSC patches was posted a few minutes ago to the mailing list.
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