linux kernel 4.18 release

Following a number of delays, Linus Torvalds has finally announced release of a Linux 4.18, the latest stable release of the Linux kernel.

Announcing the arrival of Linux 4.18 on the Linux Kernel Mailing List (LKML), Linus Torvalds writes:

“One week late(r) and here we are – 4.18 is out there. It was a very calm week, and arguably I could just have released on schedule last week, but we did have some minor updates.”

In development since June, the Linux 4.18 cycle has taken a little longer to fully form that anticipated, but with a decent change-log attached, I’m sure most won’t mind.

Linux 4.18 is also lighter than previous releases, with nearly 100k fewer lines of (obsolete) code than Linux 4.17.

What’s new in Linux 4.18

Linux 4.18 has almost 100k fewer lines of code than Linux 4.17

Compiling a list of the improvements and new features in Linux 4.18 isn’t easy. There is (as always) a veritable flood of lot of low-level, technical sounding stuff that, while vitally important, doesn’t “read” particularly sexy.

Linux 4.18 ramps up support for dual-lane transfer in USB 3.2, features a stack of new video drivers, including support for the AMD Radeon RX Vega M graphics processor (used in the Intel + AMD combo chips), and serves as the first upstream kernel to ship with complete support for the Raspberry Pi 3B and the 3B+.

Also gaining support this release is the Qualcomm Snapdragon 845 processor. This chip, while featured in some high-end phones, is also found in those new-fangled Windows 10 ARM laptops.

A reverse engineered Steam Controller driver has been added to the Linux kernel to allow the device to work as a regular HID (input) device ‘out of the box’ on Linux distros — no need to install the Steam client or the “official” Steam controller driver.

The “unofficial” driver allows the gamepad to work with regular Linux apps as a virtual mouse/touchpad/keyboard. This driver also exposes battery information, and works over USB and wireless connection.

The good news for gamers is that the unofficial kernel driver does not affect the use of the official (user space) Steam controller driver in Steam.

Sound chip improvements also feature heavily in this update. Linux 4.18 ships with improved support for select Creative Labs CA0132 devices, support for audio on the HP Spectre x360 laptop, and support for a slate of Realtek chips and MediaTek controllers.

Other Linux 4.18 features include:

  • AMDGPU support improvements
  • V3D DRM driver mainlined (will benefit new Raspberry Pi hardware)
  • Initial support for NVIDIA Volta GV100 hardware
  • Qualcomm Snapdragon 845 support
  • Speck — yes, that Speck — filesystem encryption support
  • Lustre filesystem removed (no longer maintained)
  • Initial support for Vega M graphics hardware
  • Performance optimisations in CPUfreq
  • Various USB Type-C, Thunderbolt improvements
  • Temperature report for AMD Stoney Ridge/Bristol Ridge APUs
  • Chromebook ‘switch’ driver for moving between tablet/clamshell modes
  • KVM Microsoft Hyper-V improvements
  • Kernel polling interface for asynchronous I/O
  • Continued work to tackle the Year 2038 problem

For a fuller look at everything that’s new in Linux Kernel 4.18 do head over to the official mailing list announcement (or the Linux kernel website and follow the links).

It’s also worth checking out Kernel Newbies, who present a parseable presentation of all that’s new, while LWN has a nice overview of key statistics from the Linux 4.18 development cycle. 

HP intel linux kernel raspberry pi steam controller