![]() In order to calculate the size of your swap file use swapon to get the size of your zram device. The first step is to create a btrfs sub volume to contain the swap file. That being said, if it does not work it still adds some small bloat which you might want to remove. The changes introduced in this article are linked to the systemd rvice and hibernation.target units and hence won’t execute on their own nor interfere with your system if you don’t initiate a hibernation. In that case feel free to reach out to the comment section of the gist on github, or try the tips from the troubleshooting section at the bottom of this article. Due to possible shortcomings of certain drivers you might experience glitches like non-working wifi or display after resuming from hibernation. ![]() Hibernation following this guide might not work flawless on your particular machine(s). A persistent swap file is not recommended in conjunction with ZRAM, as it creates some confusing problems compromising your systems stability. The swap file is created just before and removed right after hibernation to avoid trouble with ZRAM. The technique configures systemd and dracut to store and restore the contents of your RAM in a temporary swap file on disk. Unfortunately this means you don’t have persistent space to move your RAM upon hibernation when powering off your machine. This is a sophisticated approach to swap using compression inside a portion of your RAM to avoid the slower on-disk swap files. Upon next boot this state is restored from disk to memory such that everything, including open programs, is how you left it.įedora Workstation uses ZRAM. Hibernation stores the current runtime state of your machine – effectively the contents of your RAM, onto disk and does a clean shutdown. If Secure Boot is enabled and the kernel boots in lockdown mode, hibernation does not work as long as the kernel does not support signed hibernation images. UPDATE: There is a new rather severe caveat to this article. This article walks you through the manual setup for hibernation in Fedora Linux 36 Workstation using BTRFS and is based on a gist by eloylp on github.
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