Linux kernel 7.3 released with gaming-focused improvements

Linus Torvalds released Linux kernel 7.3 on schedule, with notable contributions from Valve targeting gaming workloads. The release improves graphics memory handling for limited-VRAM systems, adds CPU scheduling optimizations, extends support to older Radeon GPUs from HD 7000 through Polaris/Fiji, and introduces built-in driver support for Valve's new Steam Controller. Additional changes include a new gamepad driver for the MSI Claw handheld, default enablement of Intel Nova Lake graphics, and Nouveau Vulkan Video groundwork.

What changed for Linux gamers in 7.3

• VRAM management: Valve-funded kernel changes improve how games use limited video memory, but full benefit requires userspace tools (dmemcg-booster, plasma-foreground-booster) and compatible GPU drivers
• CPU scheduling: Scheduler improvements may boost performance, particularly on older hardware
• AMD GPU support: Expanded compatibility for Radeon HD 7000 series through Polaris and Fiji; improved crash recovery for some older cards without requiring reboot
• Controller support: New built-in driver for 2026 Steam Controller; new driver for MSI Claw integrated gamepad
• Graphics enablement: Intel Nova Lake graphics enabled by default; Nouveau driver receives Vulkan Video hardware decoding groundwork
• Storage: Btrfs and EXT4 performance improvements
• Future hardware: Additional preparation for AMD Zen 6 processors

Why it matters

The VRAM improvements address a persistent pain point for Linux gaming on mid-range hardware, though the fragmented requirements across kernel, userspace tools, and drivers mean benefits will roll out unevenly. The expanded AMD GPU support extends viable gaming hardware to older cards often excluded by proprietary driver timelines.