[Bug 1864191] Re: focal-server d-i image doesn't detect network hardware

[Dimitri John Ledkov]

The running kernel on focal media is built with 9 ABI, from src:linux

The udeb kernel modules however are built with the 14 ABI, from
src:linux-5.4

So it seems as if d-i is getting missbuilt somewhere.

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Title:
  focal-server d-i image doesn't detect network hardware

Status in debian-installer package in Ubuntu:
  New

Bug description:
  The Focal d-i image up to at least 20200221 does not detect network
  hardware during the installation process. The installer stops with the
  "no network hardware detected" red screen, and indeed no network
  device is available and there is no mention of NICs in the dmesg.

  Step to reproduce:

  1. Download the latest focal-server-amd64 image
  2. Install it in a VM with something like: `virt-install --disk bus=virtio,size=4 --cdrom focal-server-amd64.iso`
  3. Accept all the defaults up to the failure point.
  4. Test different "hardware" by passing `--network bridge=virbr0,model=e1000` or --network bridge=virbr0,model=rtl8139` to virt-install. It still won't work.
  5. Try with the Eoan image and verify it works.

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