Can not load essential driver for HWE kernel on 20200806.1 bionic ISO

[Ike Panhc]

With arm64 image proposed for 18.04.5, when select HWE kernel and install from grub menu, installer can not find needed kernel driver for ethernet including mlx5, hns3.

There is no such issue when using 4.15 kernel or with 18.04.4 ISO and 5.3 HWE kernel.

ISO fails to load driver with HWE kernel:
http://cdimage.ubuntu.com/ubuntu-server/bionic/daily/20200806.1/bionic-server-arm64.iso

ISO success to load driver with HWE kernel:
http://cdimage.ubuntu.com/releases/18.04.4/release/ubuntu-18.04.4-server-arm64.iso

In the 20200806.1 arm64 server ISO, it is still with 5.3 udebs

$ find pool -name '*5.3*.udeb'
pool/main/l/linux-hwe/block-modules-5.3.0-28-generic-di_5.3.0-28.30~18.04.1_arm64.udeb
pool/main/l/linux-hwe/block-modules-5.3.0-64-generic-di_5.3.0-64.58~18.04.1_arm64.udeb
pool/main/l/linux-hwe/crypto-modules-5.3.0-28-generic-di_5.3.0-28.30~18.04.1_arm64.udeb
pool/main/l/linux-hwe/crypto-modules-5.3.0-64-generic-di_5.3.0-64.58~18.04.1_arm64.udeb
pool/main/l/linux-hwe/fat-modules-5.3.0-28-generic-di_5.3.0-28.30~18.04.1_arm64.udeb
pool/main/l/linux-hwe/fat-modules-5.3.0-64-generic-di_5.3.0-64.58~18.04.1_arm64.udeb

[Ike Panhc (ikepanhc)]

In 20200806.1 arm64 server ISO, HWE udebs are only available in "pool/main/l/linux-hwe" but it shall be "pool/main/l/linux-hwe-5.4"

$ find . -name 'usb-modules*udeb'
./pool/main/l/linux/usb-modules-4.15.0-112-generic-di_4.15.0-112.113_arm64.udeb
./pool/main/l/linux/usb-modules-4.15.0-76-generic-di_4.15.0-76.86_arm64.udeb
./pool/main/l/linux-hwe/usb-modules-5.3.0-28-generic-di_5.3.0-28.30~18.04.1_arm64.udeb
./pool/main/l/linux-hwe/usb-modules-5.3.0-64-generic-di_5.3.0-64.58~18.04.1_arm64.udeb

Same issue also exists on amd64 images

[Dimitri John Ledkov (xnox)]

https://git.launchpad.net/~ubuntu-core-dev/ubuntu-seeds/+git/platform/commit/?id=bbc8d8b92b14cdb9f4dd502d728803e14fb02d9e

[Łukasz Zemczak (sil2100)]

Thank you for reporting this Ike, and thank you Dimitri for pushing the missing seeds change. I have now started rebuilding the d-i based server images.

[Ike Panhc (ikepanhc)]

Tested 20200810 d-i arm64 ISO on Hisilicon d05 and this issue is fixed.

[1] http://cdimage.ubuntu.com/ubuntu-server/bionic/daily/20200810/bionic-server-arm64.iso