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I just tried to install the HWE stack using sudo apt-get install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04, but it does not fully install. There is no boot image generated, nothing is loaded in /lib/modules for it, etc. What am I doing wrong?

Output of install command:

The following NEW packages will be installed:

  linux-generic-hwe-18.04 xserver-xorg-hwe-18.04

0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.

Need to get 0 B/15.2 kB of archives.

After this operation, 248 kB of additional disk space will be used.

Selecting previously unselected package linux-generic-hwe-18.04.

(Reading database ... 407048 files and directories currently installed.)

Preparing to unpack .../linux-generic-hwe-18.04_4.18.0.15.65_amd64.deb ...

Unpacking linux-generic-hwe-18.04 (4.18.0.15.65) ...

Selecting previously unselected package xserver-xorg-hwe-18.04.

Preparing to unpack .../xserver-xorg-hwe-18.04_1%3a7.7+19ubuntu8~18.04.2_amd64.deb ...

Unpacking xserver-xorg-hwe-18.04 (1:7.7+19ubuntu8~18.04.2) ...

Setting up xserver-xorg-hwe-18.04 (1:7.7+19ubuntu8~18.04.2) ...

Setting up linux-generic-hwe-18.04 (4.18.0.15.65) ...

Output of uname -a

Linux my-computer-name 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Output of attempting to manually install two apparently missing dependencies:

sudo apt install linux-image-generic-hwe-18.04 linux-headers-generic-hwe-18.04

[sudo] password for brandon: 

Reading package lists... Done

Building dependency tree       

Reading state information... Done

linux-headers-generic-hwe-18.04 is already the newest version (4.18.0.15.65).

linux-headers-generic-hwe-18.04 set to manually installed.

linux-image-generic-hwe-18.04 is already the newest version (4.18.0.15.65).

linux-image-generic-hwe-18.04 set to manually installed.

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Output of dpkg -l | grep linux-image

rc  linux-image-4.15.0-20-generic                   4.15.0-20.21                                 amd64        Signed kernel image generic

ii  linux-image-4.15.0-45-generic                   4.15.0-45.48                                 amd64        Signed kernel image generic

ii  linux-image-4.18.0-15-generic                   4.18.0-15.16~18.04.1                         amd64        Signed kernel image generic

ii  linux-image-generic                             4.15.0.45.47                                 amd64        Generic Linux kernel image

ii  linux-image-generic-hwe-18.04                   4.18.0.15.65                                 amd64        Generic Linux kernel image

Output of sudo update-grub

Sourcing file `/etc/default/grub'

Generating grub configuration file ...

Found linux image: /boot/vmlinuz-4.15.0-45-generic

Found initrd image: /boot/initrd.img-4.15.0-45-generic

Found Windows Boot Manager on /dev/sdb1@/efi/Microsoft/Boot/bootmgfw.efi

Adding boot menu entry for EFI firmware configuration

done

[This laptop came preinstalled with Windows and used to run it, hence the WBM entry.]

Error when trying to manually reinstall image:

depmod: ERROR: could not open directory /lib/modules/4.18.0-15-generic: No such file or directory

depmod: FATAL: could not search modules: No such file or directory

dpkg: error processing package linux-image-4.18.0-15-generic (--configure):

 installed linux-image-4.18.0-15-generic package post-installation script subprocess returned error exit status 1

You can reinstall this kernel and modules with low-level commands (download and direct extract to the file-system):

apt-get download linux-image-4.18.0-15-generic

apt-get download linux-modules-extra-4.15.0-20-generic

apt-get download linux-modules-4.15.0-20-generic

apt-get download linux-headers-4.15.0-20-generic



sudo dpkg -x linux-image-4.18.0-15-generic*.deb /

sudo dpkg -x linux-modules-extra-4.15.0-20-generic*.deb /

sudo dpkg -x linux-modules-4.15.0-20-generic*.deb /

sudo dpkg -x linux-headers-4.15.0-20-generic*.deb /



sudo update-grub

then reinstall them with regular way:

sudo apt-get install --reinstall linux-image-4.18.0-15-generic

sudo apt-get install --reinstall linux-modules-extra-4.15.0-20-generic

sudo apt-get install --reinstall linux-modules-4.15.0-20-generic

sudo apt-get install --reinstall linux-headers-4.15.0-20-generic

and finally install the HWE:

sudo apt-get install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04