Comment 1 for bug 1579457

On manual partitioning, ubiquity systematically formats the SWAP partition, even if this SWAP partition is perfectly valid.

I can suggest 2 workarounds for keeping compatibility with other distribution(s) installed on the same machine, whose '/etc/fstab' reference the SWAP partition.

1) Where possible, use GPT (GUID Partition Table) on the mass storage unit containing the SWAP partition, and reference the SWAP partition by its PARTLABEL (which ubiquity does NOT modify).

2) After completion of ubiquity, but before reboot, use the attached BASH script, which :
    - sets the filesystem label of the SWAP partition to a value beginning by SWAP,
    - sets the filesystem label of the distribution root partition to a value beginning by the distribution name,
    - converts the ugly UUID references generated by ubiquity inside '/etc/fstab' into human-readable LABEL references

In the hope that these workaround suggestions may be helpful.