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Ubuntu 18.04 LTS recieves 5.4.0 Kernel


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5.4 Changes (Source : omgubuntu.co.uk )


Linux 5.4 Features

The headline addition in Linux 5.4 is a new kernel lockdown mode that aims to improve the separation of UID 0 (aka root) and the kernel.

The feature, implemented as a Linux Security Module, isn’t enabled by default but can be configured (with the understanding that anything relying on low-level access (be it hardware or the kernel) may be impacted.

Elsewhere, there’s ample dose of AMD related additions. This includes support for AMD Navi 12 and 14 GPUs, AMD Arcturus graphics cards, and the AMD Dali APU and AMD 2020 APU platforms.

Linux 5.4 also introduces (early) support for Intel Tiger Lake hardware and improves display colour management under the Nouveau open source driver.

ARM fans will appreciate the inclusion of mainline Linux support for the Qualcomm Snapdragon 855‘s reference board. Sadly, no products using this particular chipset are currently supported, but a solid foundation towards that ability is now in place.

A bunch of ARM-based laptops running the Snapdragon 835 SoC are supported by Linux 5.4, including the ASUS NovaGo, HP Envy X2 and the Lenovo Miix 630.

Support for the Lenovo Yoga C360, based on the Snapdragon 850 SoC, also features.

Staying with Snapdragon, Linux 5.4 adds mainline support for phones based on the Snapdragon 410. This includes devices like the Samsung Galaxy A3 and A5 — though don’t expect to see desktop Linux distributions running on them just yet.

Improvements to the way cryptographic keys are added, removed and/or derived in fscrypt, the encryption API used in ext4/f2fs/ubifs file system encryption help improve security.

Also on the file system front, there’s optional case-insensitive file and folder handling available in f2fs.

Other Linux 5.4 changes:

  • Faster large directory modifications on XFS
  • exFAT drivers in staging
  • VirtIO-FS merged for improved VM folder sharing
  • AMD Ryzen 3000 temperature reporting
  • Support for RTL8125 network device
  • RK3288 VP8 decoding
  • ASpeed AST2600 (server management processor) support
  • Support for Intel Ice Lake Thunderbolt
  • Power management tweaks, inc. Intel TCC thermal offset
  • Sound Open Firmware improvements

Among the devices, peripherals and hardware that should “just work” with the Linux 5.4 kernel:

  • MobileStudio Pro 13 graphic tablet
  • Logitech G700(s) receivers
  • Logitech Lightspeed receiver
  • Creative SB0540 IR receivers
  • Smart Tech touchscreen panel
  • Mygica T230C TV tuner
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