GNOME Mutter Improves Damage Tracking For Secondary GPU Copy Buffers

{"#Ray_Strode_and_Mutter":"Ray Strode, a contributor to the GNOME Mutter project, authored the code to track damage for secondary GPU copy buffers. He explained that the native backend copies rendered frames when a monitor is connected to a different GPU. The code was initially held up due to concerns about AI-generated commit messages, but was eventually merged into Mutter Git.","##Damage_Tracking_Improvement":"The improvement involves adding a new data structure, MetaSecondaryGpuCopyState, which records the last successful source frame in each destination buffer. This helps in including every change needed by the selected buffer and handles older buffers and regions with more than 16 rectangles.","##Impact_on_Multi-GPU_Setups":"This improvement will particularly benefit users with hybrid laptops, where the display is connected to a different GPU than the one used for rendering. The native backend will now copy rendered frames to the correct GPU, reducing the risk of older pixels appearing in the display."}