What’s New in Linux Kernel 6.3? Key Features and Hardware Support Explained
Linux kernel 6.3, released after two months of development, brings a host of new power‑management drivers for ARM and RISC‑V, filesystem enhancements, expanded Thunderbolt and HID support, and numerous hardware driver updates, offering developers fresh capabilities while requiring manual compilation for immediate use.
After seven candidate versions and two months of work, Linus Torvalds announced the official release of Linux 6.3, inviting developers to download it from https://kernel.org/.
As expected, Linux 6.3 introduces many enable‑by‑default features and adds support for upcoming Intel and AMD CPUs and graphics hardware, though most users will not see immediate benefits.
In the architecture domain, new power‑management drivers for ARM and RISC‑V are included; RISC‑V gains support for accelerated string functions via the Zbb bit‑operation extension, and ARM receives support for the Scalable Matrix Extension 2 instruction.
Filesystem updates: NFS (client and server) now supports AES‑SHA2 encryption; EXT4 sees direct I/O performance optimizations; EROFS gains low‑latency decompression; and the Btrfs driver is faster.
Thunderbolt support is improved with a new DisplayPort bandwidth allocation mode; better support for Lenovo Yoga Tab 3 tablets, 8BitDo Pro 2 wired controller, Lenovo Yoga Book 2‑in‑1 laptops, and eBPF support for HID devices.
Hardware support now includes native Steam Deck controller interfaces, enabling Logitech G923 Xbox racing wheel on Linux, a new libata‑based pata_parport driver for IDE devices over parallel ports (replacing the old PARIDE driver), and many other driver updates.
Other highlights:
User‑space Linux now supports Rust code.
Support for Realtek RTL8188EU Wi‑Fi adapters.
Support for Qualcomm Wi‑Fi 7 chipsets.
Ethernet support for NVIDIA BlueField 3 DPU.
Multipath TCP can handle mixed IPv4/IPv6 flows.
New hardware noise tools.
KVM now supports Hyper‑V extended hypercalls.
Numerous single‑board computers benefit from updated drivers, including BananaPi R3, BPI‑M2 Pro, and Orange Pi R1 Plus, while over 150,000 lines of legacy ARM board support code have been removed.
Developers can download the kernel from https://kernel.org/ and must compile it manually to use it; otherwise they can wait for their distribution’s stable repositories to include the new version.
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