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I am using Kubuntu, and one very irritating feature in (K)ubuntu 20.04 is the enforcement of live usb disk checking at startup, and if you are not fast enough to press ctr-c then it will take minutes scanning (which is not needed for 99.99999999999% of the cases). So, is there a way to skip it by adding an option in the booting startup screen. Also, I made a remastered iso file of my system and the problem still exist in the remastered version. Are there any settings in the system I can change to disable disk checking in startup for the remastered version???

Thanks.

Mahmoud Alnaanah
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  • If you create a bug report about this, please post a link to it, so that we can confirm it by marking 'Afffects me too'. – sudodus Apr 27 '20 at 11:28
  • Welcome to Ask Ubuntu. There have been alot of complaints about auto disk check every boot. If you don't need the Live USB for installing Ubuntu you can do a full install to USB: https://askubuntu.com/questions/1217832/how-to-create-a-full-install-of-ubuntu-20-04-to-usb-device-step-by-step . There is no Disk Check with a Full install, as well as other advantages: https://askubuntu.com/questions/1231661/do-i-need-to-install-ubuntu-on-my-hard-drive/1231705#1231705 – C.S.Cameron Apr 28 '20 at 03:59
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    Have made a Bug Report, feel free to join in: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1875548 – C.S.Cameron Apr 28 '20 at 06:38
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    The command line option fsck.mode=skip can be used to skip the disk check. – C.S.Cameron Apr 29 '20 at 02:28

1 Answers1

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Removing Disk Check on Persistent USB's

The command line option fsck.mode=skip can be used to skip the disk check.

The line Checking disks: 0% complete will still come up but fsck will not be run, nor will boot time be increased.

mkusb After the Persistent USB drive is created, open /boot/grub/grub.cfg as root.

  • Add fsck.mode=skip to the Persistent menuentry thus:

    linux ($root)/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity fsck.mode=skip quiet splash persistent ---

  • Newer versions of mkusb already include this fix.

  • If you also wish to remove the Try Ubuntu / Install Ubuntu screen delete "maybe-ubiquity".

UNetbootin After creating the boot drive, open /boot/grub/grub.cfg as root.

  • Add fsck.mode=skip to the first menuentry for (UEFI boot mode).

  • Open syslinux.cfg as root and add fsck.mode=skip to the default menuentry for (BIOS boot mode).

Rufus After creating the boot drive, open /boot/grub/grub.cfg as root.

  • Add fsck.mode=skip to the Default menuentry for (UEFI boot mode).

  • Open /isolinux/txt.cfg as root and add fsck.mode=skip to the "Try Ubuntu without installing" menuentry, (for BIOS boot mode).

The Try Ubuntu / Install Ubuntu screen can be removed from BIOS boot by overwriting syslinux.cfg with:

default persistent
label persistent
  say Booting an Ubuntu Persistent session...
  kernel /casper/vmlinuz
  append  file=/cdrom/preseed/ubuntu.seed boot=casper persistent initrd=/casper/initrd quiet splash noprompt --

The Try Ubuntu / Install Ubuntu screen can be removed from Rufus UEFI boot by removing "maybe-ubiquity" from /boot/grub/grub.cfg.

C.S.Cameron
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