Dependency problem ?

[igorpecovnik]

While playing around Ubuntu 26.04 and trying to switch from apt to beta repository ...

Note, selecting 'linux-image-azure' for glob 'linux-image*'
Note, selecting 'linux-image-aws' for glob 'linux-image*'
Note, selecting 'linux-image-6.17.0-1002-oracle' for glob 'linux-image*'
Note, selecting 'linux-image-gcp' for glob 'linux-image*'
Note, selecting 'linux-image-fb-generic-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-uc-oem-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-generic-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-uc-oem-24.04a' for glob 'linux-image*'
Note, selecting 'linux-image-uc-generic' for glob 'linux-image*'
Note, selecting 'linux-image-oem-24.04a' for glob 'linux-image*'
Note, selecting 'linux-image-6.17.0-1002-aws' for glob 'linux-image*'
Note, selecting 'linux-image-realtime-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-extra-virtual-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-6.17.0-1002-gcp' for glob 'linux-image*'
Note, selecting 'linux-image-uc-realtime-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-uc-realtime-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-2.6-rt' for glob 'linux-image*'
Note, selecting 'linux-image-fb-generic-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-uc-generic-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-oem-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-virtual' for glob 'linux-image*'
Note, selecting 'linux-image-realtime' for glob 'linux-image*'
Note, selecting 'linux-image-legacy-x86' for glob 'linux-image*'
Note, selecting 'linux-image-unsigned-6.17.0-1002-aws' for glob 'linux-image*'
Note, selecting 'linux-image-edge-wsl2-x86' for glob 'linux-image*'
Note, selecting 'linux-image-realtime-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-unsigned-6.17.0-1002-gcp' for glob 'linux-image*'
Note, selecting 'linux-image-6.17.0-1001-realtime' for glob 'linux-image*'
Note, selecting 'linux-image-oracle-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-unsigned-6.17.0-1003-azure' for glob 'linux-image*'
Note, selecting 'linux-image-oracle' for glob 'linux-image*'
Note, selecting 'linux-image-extra-virtual-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-extra-virtual' for glob 'linux-image*'
Note, selecting 'linux-image-amd64' for glob 'linux-image*'
Note, selecting 'linux-image-virtual-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-virtual-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-fb-generic' for glob 'linux-image*'
Note, selecting 'linux-image-current-wsl2-x86' for glob 'linux-image*'
Note, selecting 'linux-image-virtual-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-uc-generic-hwe-24.04-edge' for glob 'linux-image*'
Note, selecting 'linux-image-current-x86' for glob 'linux-image*'
Note, selecting 'linux-image-unsigned-6.17.0-5-generic' for glob 'linux-image*'
Note, selecting 'linux-image-6.17.0-1003-azure' for glob 'linux-image*'
Note, selecting 'linux-image-unsigned-6.17.0-1002-oracle' for glob 'linux-image*'
Note, selecting 'linux-image-generic' for glob 'linux-image*'
Note, selecting 'linux-image-6.17.0-5-generic' for glob 'linux-image*'
Note, selecting 'linux-image-generic-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-uc-6.17.0-1001-realtime' for glob 'linux-image*'
Note, selecting 'linux-image-uc-realtime-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image' for glob 'linux-image*'
Note, selecting 'linux-image-gcp-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-uc-6.17.0-5-generic' for glob 'linux-image*'
Note, selecting 'linux-image-realtime-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-armbian' for glob 'linux-image*'
Note, selecting 'linux-image-extra-virtual-hwe-24.04' for glob 'linux-image*'
Note, selecting 'linux-image-rt-amd64' for glob 'linux-image*'
Note, selecting 'linux-image-edge-x86' for glob 'linux-image*'
Note, selecting 'linux-image-unsigned-6.17.0-1001-realtime' for glob 'linux-image*'
Note, selecting 'linux-image-uc-realtime' for glob 'linux-image*'
Note, selecting 'linux-image-aws-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-uc-generic-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-fb-generic-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-azure-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-generic-6.17' for glob 'linux-image*'
Note, selecting 'linux-image-cloud-x86' for glob 'linux-image*'
Package 'linux-image-fb-generic' is not installed, so not removed
Package 'linux-image-fb-generic-6.17' is not installed, so not removed
Package 'linux-image-fb-generic-hwe-24.04' is not installed, so not removed
Package 'linux-image-fb-generic-hwe-24.04-edge' is not installed, so not removed
Package 'linux-image-amd64' is not installed, so not removed
Package 'linux-image-rt-amd64' is not installed, so not removed
Package 'linux-image-2.6-rt' is not installed, so not removed
Package 'linux-image-cloud-x86' is not installed, so not removed
Package 'linux-image-current-wsl2-x86' is not installed, so not removed
Package 'linux-image-edge-wsl2-x86' is not installed, so not removed
Package 'linux-image-edge-x86' is not installed, so not removed
Package 'linux-image-legacy-x86' is not installed, so not removed
Package 'linux-image-aws' is not installed, so not removed
Package 'linux-image-aws-6.17' is not installed, so not removed
Package 'linux-image-azure' is not installed, so not removed
Package 'linux-image-azure-6.17' is not installed, so not removed
Package 'linux-image-gcp' is not installed, so not removed
Package 'linux-image-gcp-6.17' is not installed, so not removed
Package 'linux-image-generic' is not installed, so not removed
Package 'linux-image-generic-6.17' is not installed, so not removed
Package 'linux-image-generic-hwe-24.04' is not installed, so not removed
Package 'linux-image-generic-hwe-24.04-edge' is not installed, so not removed
Package 'linux-image-6.17.0-1002-aws' is not installed, so not removed
Package 'linux-image-unsigned-6.17.0-1002-aws' is not installed, so not removed
Package 'linux-image-6.17.0-1002-gcp' is not installed, so not removed
Package 'linux-image-unsigned-6.17.0-1002-gcp' is not installed, so not removed
Package 'linux-image-6.17.0-1002-oracle' is not installed, so not removed
Package 'linux-image-unsigned-6.17.0-1002-oracle' is not installed, so not removed
Package 'linux-image-6.17.0-1003-azure' is not installed, so not removed
Package 'linux-image-unsigned-6.17.0-1003-azure' is not installed, so not removed
Package 'linux-image-6.17.0-5-generic' is not installed, so not removed
Package 'linux-image-unsigned-6.17.0-5-generic' is not installed, so not removed
Package 'linux-image-extra-virtual' is not installed, so not removed
Package 'linux-image-extra-virtual-6.17' is not installed, so not removed
Package 'linux-image-extra-virtual-hwe-24.04' is not installed, so not removed
Package 'linux-image-extra-virtual-hwe-24.04-edge' is not installed, so not removed
Package 'linux-image-oem-24.04' is not installed, so not removed
Package 'linux-image-oem-24.04a' is not installed, so not removed
Package 'linux-image-oracle' is not installed, so not removed
Package 'linux-image-oracle-6.17' is not installed, so not removed
Package 'linux-image-uc-6.17.0-5-generic' is not installed, so not removed
Package 'linux-image-uc-generic' is not installed, so not removed
Package 'linux-image-uc-generic-6.17' is not installed, so not removed
Package 'linux-image-uc-generic-hwe-24.04' is not installed, so not removed
Package 'linux-image-uc-generic-hwe-24.04-edge' is not installed, so not removed
Package 'linux-image-uc-oem-24.04' is not installed, so not removed
Package 'linux-image-uc-oem-24.04a' is not installed, so not removed
Package 'linux-image-virtual' is not installed, so not removed
Package 'linux-image-virtual-6.17' is not installed, so not removed
Package 'linux-image-virtual-hwe-24.04' is not installed, so not removed
Package 'linux-image-virtual-hwe-24.04-edge' is not installed, so not removed
Package 'linux-image-6.17.0-1001-realtime' is not installed, so not removed
Package 'linux-image-unsigned-6.17.0-1001-realtime' is not installed, so not removed
Package 'linux-image-realtime' is not installed, so not removed
Package 'linux-image-realtime-6.17' is not installed, so not removed
Package 'linux-image-realtime-hwe-24.04' is not installed, so not removed
Package 'linux-image-realtime-hwe-24.04-edge' is not installed, so not removed
Package 'linux-image-uc-6.17.0-1001-realtime' is not installed, so not removed
Package 'linux-image-uc-realtime' is not installed, so not removed
Package 'linux-image-uc-realtime-6.17' is not installed, so not removed
Package 'linux-image-uc-realtime-hwe-24.04' is not installed, so not removed
Package 'linux-image-uc-realtime-hwe-24.04-edge' is not installed, so not removed
Solving dependencies... Error!
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
armbian-common : Depends: linux-image
E: Unable to satisfy dependencies. Reached two conflicting decisions:

1. linux-image-unsigned-6.17.0-5-generic:amd64 is not selected for install
2. linux-image-unsigned-6.17.0-5-generic:amd64=6.17.0-5.5 is selected for install because:
   1. armbian-common:amd64 is selected for install
   2. armbian-common:amd64 Depends linux-image
      [selected armbian-common:amd64]
      For context, additional choices that could not be installed:
   • In armbian-common:amd64 Depends linux-image:
     • linux-image-current-x86:amd64=25.11.0-trunk is not selected for install
     • linux-image-current-x86:amd64=26.2.0-trunk.12 is not selected for install
     • linux-image-6.17.0-1001-realtime:amd64=6.17.0-1001.2 is not selected for install
     • linux-image-6.17.0-1002-aws:amd64=6.17.0-1002.2+1 is not selected for install
     • linux-image-6.17.0-1002-gcp:amd64=6.17.0-1002.2 is not selected for install
     • linux-image-6.17.0-1002-oracle:amd64=6.17.0-1002.2 is not selected for install
     • linux-image-6.17.0-1003-azure:amd64=6.17.0-1003.3 is not selected for install
     • linux-image-6.17.0-5-generic:amd64=6.17.0-5.5 is not selected for install
     • linux-image-cloud-x86:amd64=26.2.0-trunk.12 -> | linux-image-cloud-x86:amd64
       but none of the choices are installable:
       • linux-image-cloud-x86:amd64 is not selected for install
     • linux-image-current-wsl2-x86:amd64=26.2.0-trunk.12 is not selected for install
     • linux-image-edge-wsl2-x86:amd64=26.2.0-trunk.12 is not selected for install
     • linux-image-edge-x86:amd64=26.2.0-trunk.12 is not selected for install
     • linux-image-legacy-x86:amd64=26.2.0-trunk.12 is not selected for install
     • linux-image-unsigned-6.17.0-1001-realtime:amd64=6.17.0-1001.2 is not selected for install
     • linux-image-unsigned-6.17.0-1002-aws:amd64=6.17.0-1002.2 is not selected for install
     • linux-image-unsigned-6.17.0-1002-gcp:amd64=6.17.0-1002.2 is not selected for install
     • linux-image-unsigned-6.17.0-1002-oracle:amd64=6.17.0-1002.2 is not selected for install
     • linux-image-unsigned-6.17.0-1003-azure:amd64=6.17.0-1003.3 is not selected for install

[leggewie]

The problem is that the kernel package that should be installed fails to declare "Provides: linux-image". We ran across this before either in the forum or here on github. Which kernel would you have wanted to install?

[igorpecovnik]

Which kernel would you have wanted to install?

Depending on hardware / linux kernel family. When we are switching kernels, kernel is uninstalled and new is installed. In general all kernels should provide linux-image virtual package, but if they are uninstalled, this is the reason why armbian-common fails?

[leggewie]

but if they are uninstalled, this is the reason why armbian-common fails?

not sure. possibly. is the kernel uninstalled before the new one is installed?

I have a feeling we will resolve this issue via #25 eventually in case there is a brief period where no kernel is installed. Otherwise, the correct solution is for any kernel we try to install to have a proper "Provides: linux-image" declaration.

[igorpecovnik]

to have a proper "Provides: linux-image" declaration.

This should be provided by all kernels we generate.

is the kernel uninstalled before the new one is installed?

Yes. This is current mechanism.

Note. We allow only one kernel branch to be installed at the time. The reason for this decision is to cope with complexity when dealing with kernel packages that can be decade apart. Some uses zimage, some image, some have dtb, others don't, some are loaded via boot scripts, some with extlinux, somewhere we have grub ... Today things are much better from this perspective, but we need to carefully stufy if we can tear apart this logic. And we want to add another layer here that is closer to embeded Linux then generic distro such as Debian. I am talking about A/B failsafe boot logic (qbee.io), where OS can automaticlly boot into last known good kernel. Giving user an option to pick last known good kernel (GRUB default logic with multiple kernels installed on system) is not good enough in this world.