Ubuntu – How to set the RESUME variable to override these issues


I have an Ubuntu 18.10 dual boot with Windows 10. I think that because of the error below my Ubuntu crashes/hangs a lot lately at the time of reboot/startup.

$ sudo apt-get --with-new-pkgs upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following NEW packages will be installed:
  linux-headers-4.18.0-15 linux-headers-4.18.0-15-generic linux-image-4.18.0-15-generic linux-modules-4.18.0-15-generic
The following packages will be upgraded:
  linux-generic linux-headers-generic linux-image-generic
3 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 66.0 MB of archives.
After this operation, 329 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-modules-4.18.0-15-generic amd64 4.18.0-15.16 [13.4 MB]
Get:2 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-image-4.18.0-15-generic amd64 4.18.0-15.16 [8,154 kB]                     
Get:3 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-modules-extra-4.18.0-15-generic amd64 4.18.0-15.16 [32.7 MB]              
Get:4 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-generic amd64 [1,868 B]                                      
Get:5 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-image-generic amd64 [2,480 B]                                
Get:6 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-headers-4.18.0-15 all 4.18.0-15.16 [10.5 MB]                              
Get:7 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-headers-4.18.0-15-generic amd64 4.18.0-15.16 [1,195 kB]                   
Get:8 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-headers-generic amd64 [2,440 B]                              
Fetched 66.0 MB in 2min 25s (456 kB/s)                                                                                                           
Selecting previously unselected package linux-modules-4.18.0-15-generic.
(Reading database ... 197143 files and directories currently installed.)
Preparing to unpack .../0-linux-modules-4.18.0-15-generic_4.18.0-15.16_amd64.deb ...
Unpacking linux-modules-4.18.0-15-generic (4.18.0-15.16) ...
Selecting previously unselected package linux-image-4.18.0-15-generic.
Preparing to unpack .../1-linux-image-4.18.0-15-generic_4.18.0-15.16_amd64.deb ...
Unpacking linux-image-4.18.0-15-generic (4.18.0-15.16) ...
Selecting previously unselected package linux-modules-extra-4.18.0-15-generic.
Preparing to unpack .../2-linux-modules-extra-4.18.0-15-generic_4.18.0-15.16_amd64.deb ...
Unpacking linux-modules-extra-4.18.0-15-generic (4.18.0-15.16) ...
Preparing to unpack .../3-linux-generic_4. ...
Unpacking linux-generic ( over ( ...
Preparing to unpack .../4-linux-image-generic_4. ...
Unpacking linux-image-generic ( over ( ...
Selecting previously unselected package linux-headers-4.18.0-15.
Preparing to unpack .../5-linux-headers-4.18.0-15_4.18.0-15.16_all.deb ...
Unpacking linux-headers-4.18.0-15 (4.18.0-15.16) ...
Selecting previously unselected package linux-headers-4.18.0-15-generic.
Preparing to unpack .../6-linux-headers-4.18.0-15-generic_4.18.0-15.16_amd64.deb ...
Unpacking linux-headers-4.18.0-15-generic (4.18.0-15.16) ...
Preparing to unpack .../7-linux-headers-generic_4. ...
Unpacking linux-headers-generic ( over ( ...
Setting up linux-headers-4.18.0-15 (4.18.0-15.16) ...
Setting up linux-modules-4.18.0-15-generic (4.18.0-15.16) ...
Setting up linux-headers-4.18.0-15-generic (4.18.0-15.16) ...
Setting up linux-image-4.18.0-15-generic (4.18.0-15.16) ...
I: /vmlinuz.old is now a symlink to boot/vmlinuz-4.18.0-14-generic
I: /initrd.img.old is now a symlink to boot/initrd.img-4.18.0-14-generic
I: /vmlinuz is now a symlink to boot/vmlinuz-4.18.0-15-generic
I: /initrd.img is now a symlink to boot/initrd.img-4.18.0-15-generic
Setting up linux-modules-extra-4.18.0-15-generic (4.18.0-15.16) ...
Setting up linux-headers-generic ( ...
Setting up linux-image-generic ( ...
Setting up linux-generic ( ...
Processing triggers for linux-image-4.18.0-15-generic (4.18.0-15.16) ...
update-initramfs: Generating /boot/initrd.img-4.18.0-15-generic
I: The initramfs will attempt to resume from /dev/sda5
I: (UUID=09e25397-4a2c-4fb0-a605-a7013eecb59c)
I: Set the RESUME variable to override this.
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.18.0-15-generic
Found initrd image: /boot/initrd.img-4.18.0-15-generic
Found linux image: /boot/vmlinuz-4.18.0-14-generic
Found initrd image: /boot/initrd.img-4.18.0-14-generic
Found linux image: /boot/vmlinuz-4.18.0-13-generic
Found initrd image: /boot/initrd.img-4.18.0-13-generic
Found Windows Boot Manager on /dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for EFI firmware configuration

Best Answer

The swap UUID needs to be added to the /etc/initramfs-tools/conf.d/resume file.

The following command can show what your swap UUID is:

blkid | awk -F\" '/swap/ {print $2}'

You can run the following to set that in the RESUME file:

printf "RESUME=UUID=$(blkid | awk -F\" '/swap/ {print $2}')\n" | sudo tee /etc/initramfs-tools/conf.d/resume

Then run the following to update the kernels on the system:

sudo update-initramfs -u -k all

Reboot the system so the changes can take affect.

This is what I have had to do to my machine too. This happens when I install Ubuntu fresh on the system, but I allow it to pick the install without choosing manual and repartitioning leaving the old swap partition. Well, the install creates a swap file and doesn't use the old swap partition. Later I decide to use the swap partition instead of the file and I get this message because the resume was never created by default or it is set to use the swap file instead.

This does last through kernel updates.

Hope this helps!

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