Intel Lunar Lake With Battlemage iGPU Receive Support For CMRR Variable Refresh Rate Tech

Intel Lunar Lake CPUs with Battlemage iGPUs have received support for a new feature known as CMRR (Content Match Refresh Rate) in Linux.

Expanding on what CMRR actually is, it has an application similar to what other technologies such as VRR offer, but Intel says that the way CMRR works is different from the others. The latest Linux patches by Team Blue reveal that CMRR is expected to be integrated into Lunar Lake's graphics driver, which will be leveraged by the Xe2 architecture. Here is how CMRR is described by Intel's new Linux patches:

CMRR is a display feature that uses adaptive sync framework to vary Vtotal slightly to match the content rate exactly without frame drops. This feature is a variation of VRR where it varies Vtotal slightly (between additional 0 and 1 Vtotal scanlines) to match content rate exactly without frame drops using the adaptive sync framework.

Intel Linux graphics driver via Phoronix

The interesting part is yet to be, about how CMRR will work in a way to benefit those using Intel's next-gen iGPUs. For Lunar Lake, Intel will be adding its brand new Battlemage "Xe2" architecture which is expected to bring a range of new technologies and expand upon those offered by the upcoming Arc Alchemist iGPUs featured on Meteor Lake & Arrow Lake CPUs. These next-gen CPUs are expected to arrive in 2025.

However, an important factor to note is that CMRR is currently enabled with Intel display version 20, hence no current-gen hardware can support it as of right now. This might hint that Intel may make the feature exclusive to future lineups, or the company initially wants to experiment with it with high-end equipment.

The inclusion of CMRR in Intel's arsenal of software resources is a great move since it shows that the company is still committed to delivering early enablement for support Moreover, the recent developments by Team Blue in terms of delivering early next-gen support at Linux are quite exciting to see as well.

News Source: Phoronix