Xubuntu 18.04 kernel takes long to boot
I had same problem. During boot messages it would say that it timed out waiting for resume device. Check in /etc/initramfs-tools/conf.d/resume if there is UUID in it like RESUME=some-uuid remove uuid and replace with "none" to be RESUME=none. After that run sudo update-initramfs -uk all and it should be good to go.
Ive had this problem numerous times, and my solution works in all situations.
When running dsmeg, the error shows up as:
[ 6.382044] random: crng init done
[ 6.382048] random: 7 urandom warning(s) missed due to ratelimiting
[ 32.162934] EXT4-fs (sda6): mounted filesystem with ordered data mode. Opts: (null)
The solution is to:
First compare your fstab and blkid:
$ blkid
/dev/sda1: UUID="C0C0-7641" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="1085d848-f8b9-45e2-a6be-087acb32a820"
/dev/sda3: LABEL="Windows" UUID="8662302C623022FB" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="de399a3e-c832-4dca-a09d-f65789425b89"
/dev/sda4: LABEL="Windows RE tools" UUID="2262513962511341" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="18feb4e1-5770-4e13-92b8-bb8ba8005536"
/dev/sda5: UUID="81a474ab-98bf-4d40-b03e-e5e647163d7e" TYPE="ext4" PARTLABEL="Arco Linux" PARTUUID="3759200f-6317-4487-8b10-3a0140c67bd5"
/dev/sda6: LABEL="rootMX17" UUID="7bae9e4d-61fa-4187-b11f-517c799f7c94" TYPE="ext4" PARTLABEL="MX Linux" PARTUUID="417c8cbd-11b7-4fe6-9b15-ac9082d74460"
/dev/sda7: UUID="d9539219-1c29-468f-bbd0-106663fdef59" TYPE="swap" PARTLABEL="Swap" PARTUUID="fefe3061-bf7b-4a26-8c20-08e209acc28e"
$ sudo nano /etc/fstab
# /etc/fstab: static file system information
#
# Created by make-fstab on Mon Nov 19 17:10:30 EST 2018
# <file system> <mount point> <type> <$
#-> /dev/sda6 label=rootMX17
UUID=7bae9e4d-61fa-4187-b11f-517c799f7c94 / ext4 d$
#-> /dev/sda1
UUID=C0C0-7641 /boot/efi vfat d$
#-> /dev/sda7
UUID=42e5a9cd-b6e1-4d57-9a3a-2ad910862579 swap swap d$
As you can see my swap at /dev/sda7 has a different UUID in fstab than it does in blkid. This was, in my case, caused by another linux install repartitoning the swap and causing the UUID to change. The boot delay is caused by the system trying to find the new UUID of the swap. To fix it, just copy the UUID in blkid that doesnt match to the fstab file then save.
If after restart the boot error is still there, you need to additionally edit your initramfs.conf file.
Do this by:
$ sudo nano /etc/initramfs-tools/conf.d/resume
Then either by making a new file, or editing the current resume file, write on the first line RESUME=UUID=<< UUID of swap>>
For example, mine looks like
RESUME=UUID=d9539219-1c29-468f-bbd0-106663fdef59
Then run the below command to update your initramfs file.
#sudo update-initramfs -u
Then restart. The error will be gone.
I had that problem with slow boot time on ubuntu 19.04 after remowing swap partition and making swap file.
The output of dmesg
[ 2.220963] hid-generic 0003:1B1C:1B0F.0003: input,hidraw2: USB HID v1.11 Device [Corsair Corsair M45 Gaming Mouse] on usb-0000:00:14.0-1/input2
[ 33.321639] EXT4-fs (sda6): mounted filesystem with ordered data mode. Opts: (null)
[ 33.407323] systemd[1]: RTC configured in localtime, applying delta of 120 minutes to system time.
[ 33.417651] systemd[1]: Inserted module 'autofs4'
No swapfile in /etc/fstab. All mounted disks / uuids was correct.
I checked /etc/initramfs-tools/conf.d/resume but that file was missing.
I just run
sudo update-initramfs -uk all
And now it boots really fast.