Debian 9891 Published by

Steven Barrett has released a new Liquorix Linux kernel based on the Linux Kernel 6.7.2 for Debian and Ubuntu.


Liquorix is a distro kernel replacement built using the best configuration and kernel sources for desktop, multimedia, and gaming workloads.



  • Zen Interactive Tuning: Tunes the kernel for responsiveness at the cost of throughput and power usage.
    --- Virtual Memory Subsystem ---------------------------
    Mem dirty before bg writeback..:  10 %  ->  20 %
    Mem dirty before sync writeback:  20 %  ->  50 %
    --- Block Layer ----------------------------------------
    Default MQ scheduler......: mq-deadline -> bfq
    --- CPU Scheduler (CFS) --------------------------------
    Scheduling latency.............:   6    ->   3    ms
    Minimal granularity............:   0.75 ->   0.3  ms
    Wakeup granularity.............:   1    ->   0.5  ms
    CPU migration cost.............:   0.5  ->   0.25 ms
    Bandwidth slice size...........:   5    ->   3    ms
    --- CPU Scheduler (MuQSS) ------------------------------
    Scheduling interval............:   6    ->   2    ms
    ISO task max realtime use......:  70 %  ->  25 %
  • MuQSS Process Scheduler: Fair process scheduler for gaming, multimedia, and real-time loads.
  • High Resolution Scheduling: High resolution timeouts for precise low jitter task scheduling. Threaded IRQs and RCU to reduce jitter caused by periodic tick at 250hz.
  • Preemptible tree-based hierarchical RCU: RCU implementation for real-time systems.
  • Hard Kernel Preemption: Most aggressive kernel preemption before requiring real-time patches. Guarantees responsive system under high intensity mixed workload scenarios.
  • Budget Fair Queue: Proper disk scheduler optimized for desktop usage, high throughput / low latency.
  • TCP BBR Congestion Control: Fast congestion control, maximizes throughput, guaranteeing higher speeds than Cubic.
  • Binary Builds For Popular Debian Distros: Binary builds are produced for Debian Stable, Testing, and Unstable. Ubuntu builds are available on the Liquorix PPA same day within hours of Debian releases going up.
  • Distribution Kernel Drop-in Replacement: Proper distribution style configuration supporting broadest selection of hardware. Paravirtualization options enabled to reduce overhead under virtualization.
  • Minimal Debugging: Minimum number of debug options enabled to increase kernel throughput.


Debian Prerequisites:

curl '' | sudo bash

Ubuntu Prerequisites:

sudo add-apt-repository ppa:damentz/liquorix && sudo apt-get update

The Liquorix kernel can be installed by way of meta-packages. This will guarantee that the latest kernel is installed on every upgrade.


sudo apt-get install linux-image-liquorix-amd64 linux-headers-liquorix-amd64

New in 6.7-2

  * merge 6.7.2
  * include nouveau fix
   - nouveau: rip out fence irq allow/block sequences
  * add optimizations for bfq and mq-deadline
   - block/mq-deadline: use separate insertion lists
   - block/bfq: use separate insertion lists
  * update version to 6.7.2-1

Download Source Code from GitHub