Xaver’s blog

Performance on “secondary” GPUs has historically been suboptimal on Linux, especially with external GPUs.

This year, there was another display next hackfest, this time in Nice, France.

While most new applications use the GPU for rendering to achieve better performance and battery life, there are some new applications and a lot of older applications that still use CPU rendering.

As an exception to my usual posts, this time I’ll write about a feature that’s already released.

In preparation for, and at the 2025 display next hackfest, I did a bunch of hacking on using more driver features for improved efficiency and performance.

This year there was another “Display Next Hackfest”, this time thanks to AMD organizing and hosting the event at their office in Markham, Toronto.

Many people are, understandably, confused about brightness levels in content creation and consumption - both for SDR and for HDR content.

Most operating systems nowadays provide a feature like night light: Colors are adjusted over the course of the day to remove blue light in the evening, to potentially help you sleep1 and make your eyes more comfortable.

This one required a few other features to be implemented first, so let’s jump right in.

In Plasma 6.2, KWin switched from doing linear blending with HDR to blending in a gamma 2.2 space.