Quick answer: Bazzite 45 moves to Fedora 45 with Mesa 26.2.6, brings ROG Xbox Ally X20 support to the stable branch, adds initial Acer Predator Atlas 8 support and a ujust check-anticheat command for Easy Anti-Cheat Linux v2 requirements.
Bazzite 45 is out, and the gaming-focused Linux distro is now built on Fedora 45. The release brings GNOME 51.1 and KDE 6.8.2, OGC kernel 7.2.15 (6.18.60 on the NVIDIA LTS images), Mesa 26.2.6 and the latest InputPlumber.
The big handheld change is the ROG Xbox Ally X20. Support for it started on the testing branch in October and has now landed on stable. A fix for a reported custom TDP issue is still on the testing branch, and the team says it will reach stable very soon. The Acer Predator Atlas 8 gets initial support too, with InputPlumber support, a Quick Access Menu tap action and M1/M2 rear-button mappings.
Bazzite is also getting ready for Epic's Easy Anti-Cheat v2 for Linux, which the Bazzite team says will bring support for Fortnite and other games. The team also says Epic made Bazzite one of its accepted well-known signing keys. A new ujust check-anticheat command checks the published requirements, including kernel and module signing, Secure Boot, TPM 2.0, measured boot, IOMMU, kernel lockdown, kexec and BPF LSM, and gives pass/fail results with tips. There are two warnings: handheld users should hold off on enabling kernel lockdown for now, and Steam Deck users must not enable Secure Boot until the team says otherwise.
Other changes include optional network tuning through bpftune and bpfrag, ROCm OpenCL replacing Mesa OpenCL on non-NVIDIA images, support for more Logitech TrueForce racing wheels, and extest, the library behind Steam Input under Wayland, now working with the 64-bit Beta Steam client. Build changes mean some updates are now as small as 100MB.
Next up, the team is testing kernel 7.3.1 on the unstable branch, with a focus on HDMI 2.1 and VRR.