1

I recently replaced an SSD with a larger SSD. I used Clonezilla to clone the old disk to the new one. After that I used GParted Live to resize the existing partition, pushing the swap partition to the end of the disk. I also updated from Ubuntu 16.04 to 18.04.

After successfully finishing above steps I notices that the boot time became much longer. I found a few similar threads (linked below) and tried what is suggested there. However, the boot time did not reduce to the amount before the disk change.

Here is my original /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).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=e15b2ef7-c32d-46f5-a3a8-4bdc60285b4e /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=3a0c2581-52f2-4c92-9c4a-09d3f0258c05 none            swap    sw              0       0
/dev/disk/by-id/usb-Generic_USB_Flash_Disk-0:0 /mnt/usb-Generic_USB_Flash_Disk-0:0 auto nosuid,nodev,nofail,x-gvfs-show 0 0

I already replaced the UUID of the swap partition by looking into the blkid command output:

/dev/sda1: UUID="e15b2ef7-c32d-46f5-a3a8-4bdc60285b4e" TYPE="ext4" PARTUUID="000d7e8b-01"
/dev/sda5: LABEL="swap" UUID="839f9d78-77b2-491d-808d-8cd551a9eeef" TYPE="swap" PARTUUID="000d7e8b-05"

I also commented out the /dev/disk/by-id/usb-.. since I believe this was the USB stick which I booted GParted Live from. No idea why it is still defined there.

# /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).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=e15b2ef7-c32d-46f5-a3a8-4bdc60285b4e /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
# UUID=3a0c2581-52f2-4c92-9c4a-09d3f0258c05 none            swap    sw              0       0
UUID=839f9d78-77b2-491d-808d-8cd551a9eeef none            swap    sw              0       0
# /dev/disk/by-id/usb-Generic_USB_Flash_Disk-0:0 /mnt/usb-Generic_USB_Flash_Disk-0:0 auto nosuid,nodev,nofail,x-gvfs-show 0 0

The /var/log/boot.log shows the following:

         Starting Tell Plymouth To Write Out Runtime Data...
[  OK  ] Started Braille Device Support.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Braille Device Support.
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Reached target Sound Card.
[  OK  ] Started Braille Device Support.
[  OK  ] Started Tell Plymouth To Write Out Runtime Data.
[  OK  ] Started Raise network interfaces.
[ TIME ] Timed out waiting for device dev-disk-by\x2did-usb\x2dGeneric_USB_Flash_Disk\x2d0:0.device.
[DEPEND] Dependency failed for /mnt/usb-Generic_USB_Flash_Disk-0:0.
[ TIME ] Timed out waiting for device dev-disk-by\x2duuid-3a0c2581\x2d52f2\x2d4c92\x2d9c4a\x2d09d3f0258c05.device.
[DEPEND] Dependency failed for /dev/disk/by-uuid/3a0c2581-52f2-4c92-9c4a-09d3f0258c05.
[DEPEND] Dependency failed for Swap.
[  OK  ] Reached target System Initialization.
[  OK  ] Listening on UUID daemon activation socket.
[  OK  ] Listening on PC/SC Smart Card Daemon Activation Socket.
[  OK  ] Started Daily apt download activities.
...

The systemd-analyze command tells:

Startup finished in 36.037s (kernel) + 10.847s (userspace) = 46.885s
graphical.target reached after 10.835s in userspace

What can I do to improve the boot time?

Update

I looked into /var/log/boot.log again today and found this output - notice the time-out when searching for a device!:

         Starting Tell Plymouth To Write Out Runtime Data...
[  OK  ] Started Braille Device Support.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Braille Device Support.
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Reached target Sound Card.
[  OK  ] Started Braille Device Support.
[  OK  ] Started Tell Plymouth To Write Out Runtime Data.
[  OK  ] Started Raise network interfaces.    
[*     ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[**    ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[***   ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[ ***  ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[  *** ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[   ***] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[    **] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[     *] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[    **] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[   ***] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[  *** ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[ ***  ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[***   ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[**    ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[*     ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[**    ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[***   ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[ ***  ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[  *** ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
...
[ TIME ] Timed out waiting for device dev-disk-by\x2did-usb\x2dGeneric_USB_Flash_Disk\x2d0:0.device.
[DEPEND] Dependency failed for /mnt/usb-Generic_USB_Flash_Disk-0:0.
[ TIME ] Timed out waiting for device dev-disk-by\x2duuid-3a0c2581\x2d52f2\x2d4c92\x2d9c4a\x2d09d3f0258c05.device.
[DEPEND] Dependency failed for /dev/disk/by-uuid/3a0c2581-52f2-4c92-9c4a-09d3f0258c05.
[DEPEND] Dependency failed for Swap.
[  OK  ] Reached target System Initialization.
[  OK  ] Listening on UUID daemon activation socket.
[  OK  ] Listening on PC/SC Smart Card Daemon Activation Socket.
...

Related

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I suspect that there is a 'resume' file

/etc/initramfs-tools/conf.d/resume

which points to the UUID that is no longer found. You can modify that file to point to the correct UUID for the swap partition, and run

sudo update-initramfs -u

See comments #16 and #17 in the following link to a bug report,

https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1763611


There is a difference between your case and the case in the bug report,

  • in your case you are using a swap partition
  • in the case of the bug report a swap file is used (so there is no swap partition, that should be pointed to).
  • Yes, there is a resume file with a UUID which matches the UUID 3a0c2581-52f2-4c92-9c4a-09d3f0258c05 of the swap partition in the original /etc/fstab which posted in my question. – JJD Jan 24 at 16:48
  • Good luck with modifying that resume file :-) – sudodus Jan 24 at 16:50
  • I replaced the UUID and executed the update command. Output update-initramfs: Generating /boot/initrd.img-4.15.0-43-generic. I will reboot now. – JJD Jan 24 at 16:52
  • 1
    1. Are you using the ethernet (wired network) or the wifi or both? 2. Snaps are application programs, that are installed in a special way. They do not share the common libraries, and if I understand correctly, they can run in their own environment (at least to some degree). See this tutorial link – sudodus Jan 24 at 19:05
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    It can be difficult to troubleshoot problems after do-release-upgrade. I have no idea right now, but hope to come back later. Maybe you have better luck at the Ubuntu Forums, where the helpers are prepared for longer dialogues to help you try different methods, so start a thread there (at the Ubuntu Forums) with a good title and description of your problem, computer hardware and operating system (version of Ubuntu and that you have upgraded via do-release-upgrade). – sudodus Jan 28 at 12:52

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