On September 24, 2026, an AMD Display Core patch series proposed two changes to HDMI Fixed Rate Link (FRL) status polling: skip checks while the link is down, and serialize polling with link detection. The proposals address link monitoring and are separate from an earlier AMDGPU feature proposal for Linux 7.4. (AMD Display Core patch series)
What the polling proposals change
The first change would stop the driver from polling FRL status when the link is down. The second would coordinate that polling with link detection. Together, they target how AMD’s display driver handles FRL link-status checks; they are not the same change as enabling FRL by default.
How the Linux 7.4 proposal fits
Phoronix reported on September 11, 2026, that an AMDGPU feature pull sent to DRM-Next the previous day proposed enabling FRL by default in Linux 7.4. The pull also included HDMI 2.1 FreeSync, Variable Refresh Rate (VRR) and Auto Low-Latency Mode (ALLM). Phoronix reported that FRL support had landed in AMDGPU in Linux 7.2 but was initially disabled by default while VRR work was pending. (Phoronix’s report on the feature pull)
| Development stage | Proposed or reported change | Version or date |
| Earlier FRL support | Support had landed in AMDGPU and was initially disabled by default. | Linux 7.2 |
| Feature pull | Enable FRL by default; include HDMI 2.1 FreeSync, VRR and ALLM. | Sent September 10, 2026; reported September 11 |
| Reliability patches | Skip FRL polling while the link is down; serialize polling with link detection. | September 24, 2026 |
The Linux 7.4 proposal was a change to FRL’s default setting, building on support Phoronix says was already present in Linux 7.2. The later polling proposals address separate link-monitoring behavior.
What it could mean for display owners
FRL is an HDMI link mode that Phoronix describes as supporting higher resolutions and refresh rates. The Linux 7.4 feature pull concerned AMDGPU, the kernel graphics driver for AMD hardware; its proposed changes do not describe a universal change to every Linux graphics driver.
In an Arch Linux forum discussion, one participant said they already got 4K at 120 Hz on an LG C1 and asked whether the proposed kernel work would make a visible difference. Another participant said that would depend on the GPU, TV and whether the existing signal used chroma subsampling or reduced color depth. That was a conditional explanation from a forum participant, not a reported test result. (Arch Linux forum discussion)
