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I installed Ubuntu 20.04 persistent on my usb. Every time boot, it starts disk checkup. I have to press Ctrl + C every time. I want to disable it permanently. And also for each shutdown it says press enter to remove installation medium.

dlin
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Tylore
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  • There have been quite a few complaints about the disk check in Ask Ubuntu so far. I have not yet seen an answer except to do a Full install of Ubuntu to USB instead of Persistent. https://askubuntu.com/questions/1217832/how-to-create-a-full-install-of-ubuntu-20-04-to-usb-device-step-by-step . Another irritating bug is the Try Ubuntu / Install Ubuntu screen has reappeared in persistent installs. mkusb should have a fix soon. It is possible to fix in Rufus by overwriting syslinux.cfg. – C.S.Cameron Apr 27 '20 at 06:05
  • Bug report including disk check: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1863672 – C.S.Cameron Apr 27 '20 at 06:09
  • New Bug Report: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1875548 – C.S.Cameron Apr 28 '20 at 06:42
  • Thank you, for that. – Tylore Apr 28 '20 at 11:25
  • The command line option fsck.mode=skip can be used to skip the disk check. – C.S.Cameron Apr 29 '20 at 02:30

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.

Edit the boot files below booted from a desktop or Live USB, not booted from the new persistent drive.

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.

Edit 20200524: The above workaround is no longer needed.

This bug was fixed in the package casper - 1.447, as announced in: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1875548

Run:

sudo apt-get update
sudo apt-get install -y casper

I am still testing the fix.

C.S.Cameron
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  • Thanks to brian-murray for fsck.mode=skip – C.S.Cameron Apr 29 '20 at 07:37
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    Cannot find grub.cfg in /boot/grub/ . I used Rufus for installing persistent. – Tylore Apr 29 '20 at 09:53
  • @Tylore: I am running Rufus-3.10 with persistence and all default settings. If you are running the USB, /boot/grub/grub.cfg will be in /cdrom/ but that will be read only. To modify grub.cfg edit from Windows or another Live USB. – C.S.Cameron May 01 '20 at 03:59
  • @Tylore: I have edited the answer, thank you for pointing this out. – C.S.Cameron May 01 '20 at 04:42
  • @muru: Thank you for the edit but. Please explain why you say "it was just poorly formatted" and how adding a few spaces fixed it. I understand that the latest ISO uses multi space tabs where you show multiple spaces, however every example of a GRUB menuentry I can find on the Internet, including Official Ubuntu Documentation, shows single spaces in these locations, the same as I showed. I have been testing all morning and can find no advantage to adding spaces. – C.S.Cameron May 18 '20 at 06:41
  • @C.S.Cameron https://meta.askubuntu.com/a/15582/158442 – muru May 18 '20 at 08:53
  • @muru: your example is about indenting, which is spaces at the beginning of the line not between words. If you are following the example you should put eight spaces in front of "linux" in your edit. Please explain why single space between words is poor formatting. – C.S.Cameron May 18 '20 at 10:12
  • @muru My apologies, I see that there was a problem with code highlighting on that piece of code. The indents should be right but sometimes my code button does not work. I thought you did not like my single space between words. – C.S.Cameron May 18 '20 at 10:52