Initramfs problem causing slow boot time [SOLVED]

[Rainmaker]

So I had 24.04 running like a dream. Then I decided to dual boot with Ubuntu 24.04. I think I made the mistake of allowing Ubuntu to format my swap partition. So I has to edit Kubuntu's fstab file to match the new swap ID. (something I've done numerous times before with new installs). Now Kubuntu takes about 4 times longer to boot, and when I run "sudo update-initramfs -u" I get this error:

Generating /boot/initrd.img-6.8.0-51-generic
cryptsetup: ERROR: Couldn't resolve device
UUID=d809dfe9-628b-44b9-beec-e8536bdaa2ef

The strange thing is, that UUID doesn't exist on my system. Any ideas?

[oshunluvr]

Look in /etc/initramfs-tools/conf.d/ and see if you have a file named resume

It likely contains: RESUME=UUID=d809dfe9-628b-44b9-beec-e8536bdaa2ef

Edit it to the new UUID and then run update-initramfs again

sudo update-initramfs -k all -u

And yes, moving forward, it is best to simply not reformat a SWAP partition or start using SWAP files instead.

[Rainmaker]

Hi. Thanks for your reply. No that file doesn't exist. The only file in conf.d is calamares-safe-initramfs.conf which doesn't look like it contains anything of consequence.

[oshunluvr]

What about /etc/crypttab? Is the swap defined in there?

[oshunluvr]

Some of this might help:

https://unix.stackexchange.com/quest...g-in-initramfs

[Rainmaker]

Nothing in /etc/crypttab
I checked out the link, but nothing on my system is encrypted, so not sure that it applies?

[Virginio Miranda]

So I had 24.04 running like a dream. Then I decided to dual boot with Ubuntu 24.04. I think I made the mistake of allowing Ubuntu to format my swap partition. So I has to edit Kubuntu's fstab file to match the new swap ID. (something I've done numerous times before with new installs). Now Kubuntu takes about 4 times longer to boot, and when I run "sudo update-initramfs -u" I get this error:

The strange thing is, that UUID doesn't exist on my system. Any ideas?

Try to use the following command on terminal:

sudo blkid

Maybe it can show something.

[Rainmaker]

Thanks all for your suggestions so far. So this is where I'm at.
"sudo blkid" shows no UUID=d809dfe9-628b-44b9-beec-e8536bdaa2ef.
I've also done a search of the /etc & /boot folders, again, no UUID present in any file with that number.
So, I've got no idea where initramfs is picking up that UUID from in the 1st place, or how to stop the boot delay.
Any more suggestions would be welcome.

[Rainmaker]

Wow. I've finally managed to solve this:
In the /etc/default/grub file, the rogue UUID was showing in the GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" line. I removed the entry to look as it does here. then ran update-grub & update-initramfs -u, rebooted, and the issue has gone.
Thank you everyone for your help & input.