linux-image-hwe-16.04 depends on linux-generic-hwe-16.04-edge

[Lee Trager]

Installing the linux-generic-hwe-16.04 package pulls in linux-generic-hwe-16.04-edge, thus the system has linux-image-4.8.0-34-generic and linux-image-4.8.0-36-generic installed. The system then boots to 4.8.0-36.

Installing linux-generic-hwe-16.04 shouldn't pull in linux-generic-hwe-16.04-edge and only one kernel should be installed.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1666413

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Tim Gardner (timg-tpi)]

Lee - I'm not seeing this symptom. From a stock fully updated Xenial image:

rtg@ubuntu:~$ uname -r
4.4.0-64-generic
rtg@ubuntu:~$ sudo apt-get install linux-generic-hwe-16.04
[sudo] password for rtg:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  linux-headers-4.8.0-36 linux-headers-4.8.0-36-generic linux-headers-generic-hwe-16.04
  linux-image-4.8.0-36-generic linux-image-extra-4.8.0-36-generic linux-image-generic-hwe-16.04 thermald
Suggested packages:
  fdutils linux-tools
The following NEW packages will be installed:
  linux-generic-hwe-16.04 linux-headers-4.8.0-36 linux-headers-4.8.0-36-generic
  linux-headers-generic-hwe-16.04 linux-image-4.8.0-36-generic linux-image-extra-4.8.0-36-generic
  linux-image-generic-hwe-16.04 thermald
0 upgraded, 8 newly installed, 0 to remove and 0 not upgraded.
Need to get 72.4 MB of archives.
After this operation, 316 MB of additional disk space will be used.
Do you want to continue? [Y/n] n

It looks to me like it will do the right thing.

[Tim Gardner (timg-tpi)]

I did notice that linux-generic-hwe-16.04-edge is lagging by one release.

[Lee Trager (ltrager)]

I can reproduce this when trying to deploy Xenial with HWE-16.04 or in an LXD container when using apt. In both cases linux-generic-hwe-16.04 is being installed into a environment which does not currently have a kernel installed. The MAAS simple stream was just updated to use the new linux-generic-hwe-16.04 package name so its easiest to reproduce this with an LXD container.

$ sudo apt install linux-generic-hwe.16.04
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'linux-generic-hwe-16.04-edge' for regex 'linux-generic-hwe.16.04'
Note, selecting 'linux-generic-hwe-16.04' for regex 'linux-generic-hwe.16.04'
The following additional packages will be installed:
  crda grub-gfxpayload-lists grub-pc grub-pc-bin grub2-common iw libnl-genl-3-200 linux-firmware
  linux-headers-4.8.0-34 linux-headers-4.8.0-34-generic linux-headers-4.8.0-36
  linux-headers-4.8.0-36-generic linux-headers-generic-hwe-16.04 linux-headers-generic-hwe-16.04-edge
  linux-image-4.8.0-34-generic linux-image-4.8.0-36-generic linux-image-extra-4.8.0-34-generic
  linux-image-extra-4.8.0-36-generic linux-image-generic-hwe-16.04 linux-image-generic-hwe-16.04-edge
  thermald wireless-regdb
Suggested packages:
  desktop-base fdutils linux-tools
The following NEW packages will be installed:
  crda grub-gfxpayload-lists grub-pc grub-pc-bin grub2-common iw libnl-genl-3-200 linux-firmware
  linux-generic-hwe-16.04 linux-generic-hwe-16.04-edge linux-headers-4.8.0-34
  linux-headers-4.8.0-34-generic linux-headers-4.8.0-36 linux-headers-4.8.0-36-generic
  linux-headers-generic-hwe-16.04 linux-headers-generic-hwe-16.04-edge linux-image-4.8.0-34-generic
  linux-image-4.8.0-36-generic linux-image-extra-4.8.0-34-generic linux-image-extra-4.8.0-36-generic
  linux-image-generic-hwe-16.04 linux-image-generic-hwe-16.04-edge thermald wireless-regdb
0 upgraded, 24 newly installed, 0 to remove and 7 not upgraded.
Need to get 184 MB of archives.
After this operation, 792 MB of additional disk space will be used.
Do you want to continue? [Y/n]

[Andy Whitcroft (apw)]

The issue here is that in both examples you are using the wrong package name:

  sudo apt install linux-generic-hwe.16.04
  /usr/bin/apt-get --quiet --assume-yes \
    --option=Dpkg::options::=--force-unsafe-io \
    --option=Dpkg::Options::=--force-confold \
    install linux-generic-hwe.16.04

The correct package name is linux-generic-hwe-16.04. By using a non-existant package but using regular-expression characters (.) you are triggering pattern match mode. Apt even tells you this in your manual update:

  Note, selecting 'linux-generic-hwe-16.04-edge' for regex 'linux-generic-hwe.16.04'
  Note, selecting 'linux-generic-hwe-16.04' for regex 'linux-generic-hwe.16.04'

[Tim Gardner (timg-tpi)]

Good catch. I'm marking this invalid,