Optimizing Suspend/Resume Performance for FreeBSD on Thinkpad X220
By
speckx
Crackling crust, pillowy middle. The kind of bagel that earns a second cup of coffee.
Summary
The article discusses optimizing suspend/resume times for FreeBSD on a Thinkpad X220 laptop, comparing performance between FreeBSD 14.2 with Coreboot and FreeBSD 11 with proprietary BIOS. The author shares insights from studying the Libreboot log and FreeBSD dmesg log, including steps like replacing the iwm driver with iwlwifi and disabling unnecessary USB devices. The goal is to improve system responsiveness after suspend/resume cycles.
Key quotes
· 3 pulledWhen I was using this laptop with FreeBSD 11 and proprietary BIOS — it was suspending slightly faster. And resuming almost immediately — I was able to open the lid and the computer become usable immediately.
It turned out that Libreboot stores the debug log and timestamps in memory and with cbmem utility I can access it.
Studying the Libreboot log and FreeBSD dmesg log helped identify potential optimizations for suspend/resume times.
You might also wanna read
ReactOS Achieves Experimental ARM64 Support, Boots on Apple Silicon via QEMU
ReactOS, the open-source project aiming for binary compatibility with Microsoft Windows, has achieved experimental support for running on 64
phoronix.com·5d ago
Understanding the Linux TTY Subsystem: History, Architecture, and Implementation
A comprehensive technical deep-dive into the TTY (teletype) subsystem in Linux and UNIX systems. The article traces the historical origins o
linusakesson.net·12d ago
Progress on Haiku arm64 Port: Running Stably in QEMU, Targeting M1 MacBook Air
A developer is working on improving the arm64 port of Haiku, an open-source operating system, with the goal of eventually running it on an M
discuss.haiku-os.org·13d ago
Haiku Project Releases Nightly Builds and April 2026 Activity Report
The Haiku Project provides nightly builds of its open-source operating system for testing purposes, offering bleeding-edge versions with the
haiku-os.org·18d ago
Reefy: A Lightweight OS That Turns Any PC Into a Private AI Server
Reefy is a lightweight operating system that transforms any PC, laptop, mini PC, or GPU box into a private AI server with minimal setup. Use
Product Hunt·24d ago
How Multi-Token Prediction drafters accelerate Gemma 4 inference by up to 3x
This article explains how Google's Gemma 4 models achieve up to 3x faster inference through Multi-Token Prediction (MTP) drafters and specul
blog.google·26d ago