A start job is running for dev-disk-by (…)
After a full system upgrade I got following message, which was blocking the startup for 1 min and 30 secs:A start job is running for dev-disk-by\x2duuid-db1d2b48\x2d0cfb\x2d4bdf\x2dabe8\x2dfb287a4274d5.device
So I took a look here and there.And investigated a little further.. (and learned a thing or two about Swap.)
Problem Analysis
Boot log
$ journalctl -b
Apr 19 12:31:50 felipe-arch systemd[1]: Job dev-disk-by\x2duuid-db1d2b48/start timed out.
Apr 19 12:31:50 felipe-arch systemd[1]: Timed out waiting for device dev-disk-by\x2duuid-db1d2b48\x2d0cfb\x2d4bdf\x2dabe8\x2dfb287a4274d5.device.
Apr 19 12:31:50 felipe-arch systemd[1]: Dependency failed for /dev/disk/by-uuid/db1d2b48-0cfb-4bdf-abe8-fb287a4274d5.
Apr 19 12:31:50 felipe-arch systemd[1]: Dependency failed for Swap.
Aparently something with UUID and Swap is wrong.What is swap status?
$ cat /proc/swaps
Filename Type Size Used Priority
There is nothing there!Is fstab right?
$ cat /etc/fstab
# /dev/sda3 LABEL=archlinux
UUID=cbe6287b-c136-49b6-a3d5-8cdd5b739293 / ext4 defaults,data=ordered 0 1
# /dev/sda4
UUID=db1d2b48-0cfb-4bdf-abe8-fb287a4274d5 none swap defaults 0 0
/dev/sda2 /mnt/windows ntfs-3g defaults,uid=melladric,gid=users,umask=0022 0 0
What is Swap UUID?
$ lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
sda1 ntfs SYSTEM 3494F2D494F29796
sda2 ntfs A06C77246C76F47E /mnt/windows
sda3 swap a7fa69a8-31bd-448c-98de-55de4aa6f06a
sda4 ext4 archlinux cbe6287b-c136-49b6-a3d5-8cdd5b739293 /
sr0
Swap UUID in fstab is incorrect!Solution
Use the correct UUID for swap partition.In my case: a7fa69a8-31bd-448c-98de-55de4aa6f06a
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