Public bug reported:
With the current installer, Ubuntu creates /swapfile even when during
installation the drive is formatted as BTRFS.
But this will show an error in syslog and the swapfile will not be used since
btrfs does not allow a swapfile.
This means swap is disabled when Ubuntu is installed with btrfs filesystem.
This happens for everyone, it is not device specific or anything like that.
As far as I know, all best practices around swapfile and btrfs point to:
1. create a dedicated swap subvolume in the root subvolume --> note the current
Ubuntu Installer already creates @ and @home subvolumes and properly configures
them in /etc/fstab
2. create a folder /swap and mount the subvolume there.
3. create the swapfile and apply chattr +c.
4. enable swap
Please at least prevent the /swapfile from being created if filesystem
is btrfs.
Also please consider configuring swap for btrfs, since the installer
already creates subvolumes, consider creating the subvolume for @swap.
** Affects: ubiquity (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1931249
Title:
btrfs filesystem - swapfile created leads to error - swap disabled
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