Trying to work in Ubuntu's Recovery mode, I click on Drop to root shell prompt. Then within about two minutes (before I can perform the task) I get a timeout message:

[ TIME ] Timed out waiting for device dev-di...\x2d900d\x2d4144dbce7bcd.device.

This doesn't happen with all my computers.

Can someone tell me what is causing this and how to disable the timeout or the timer?

I can alternatively use the Livemedia for the maintenance, but would like to fix the default Ubuntu's Recovery Mode if possible.

The commands requested for review:

This command is run from a Pendrive:

apollo@testnode1:~$ sudo fsck -f /dev/sda6
fsck from util-linux 2.27.1
e2fsck 1.42.13 (17-May-2015)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/sda6: 237713/5177344 files (0.2% non-contiguous), 2756254/20696576 blocks

These commands are run from the normal install:

apollo@testnode2:~$ swapon
NAME      TYPE      SIZE USED PRIO
/dev/sda5 partition 7.8G   0B   -1
apollo@testnode2:~$ free -h
              total        used        free      shared  buff/cache   available
Mem:           7.3G        1.3G        4.4G        278M        1.5G        5.3G
Swap:          7.8G          0B        7.8G
apollo@testnode2:~$ sudo blkid
[sudo] password for apollo: 
/dev/sda1: LABEL="Recovery" UUID="4E98CBF598CBD99B" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="173f2864-89f9-43ca-b0e1-5eaafdab48d3"
/dev/sda2: UUID="90CE-9CE3" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="599b66e0-89e6-4b4e-9847-541faf11fdb9"
/dev/sda4: UUID="3874F30874F2C820" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="bf40e76a-f4bf-4f35-8e6e-8116dab7fc73"
/dev/sda5: UUID="c9334080-5716-4af6-8223-c2f7ab8b42be" TYPE="swap" PARTLABEL="SWAP" PARTUUID="c6c857f5-60d4-429a-88b3-e8f2295514c2"
/dev/sda6: UUID="183a59f8-4023-4204-bf16-ef9ab0c61c7e" TYPE="ext4" PARTUUID="4a51f6b5-089b-45ea-968f-21b41f9eb1c2"
/dev/sdb1: UUID="46b31443-958e-4bbd-a037-fbb9d8e0d7ce" TYPE="ext4" PARTUUID="65e17cc7-01"
/dev/sdb5: LABEL="swap" UUID="1be3310d-83f3-41b9-b9fe-a146965a0c38" TYPE="swap" PARTUUID="65e17cc7-05"
/dev/sdb6: LABEL="data" UUID="8c4924cc-5aaf-44bb-8e60-f49ba1431148" TYPE="ext4" PARTUUID="65e17cc7-06"
/dev/sda3: PARTLABEL="Microsoft reserved partition" PARTUUID="2f583e8e-2993-46d3-be1b-7abd83eec923"
apollo@testnode2:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#                
# / was on /dev/sda6 during installation
UUID=183a59f8-4023-4204-bf16-ef9ab0c61c7e /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda2 during installation
UUID=90CE-9CE3  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/sda5 during installation
UUID=c9334080-5716-4af6-8223-c2f7ab8b42be none            swap    sw              0       0

The timeout message doesn't show anymore. The Recovery Session, just continues into a reboot in about two minutes.