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Bug#991262: Missing mdio network module on armhf ASPEED AST2600 system

Package: installation-reports
Severity: important

Boot method: network
Image version: https://d-i.debian.org/daily-images/armhf/daily/device-tree/ 20210719-00:04:35
Date: 2021-07-19

Machine: ASPEED AST2600 EVB

Base System Installation Checklist:
[O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it

Initial boot:           [O]
Detect network card:    [E]
Configure network:      [ ]
Detect media:           [ ]
Load installer modules: [ ]
Clock/timezone setup:   [ ]
User/password setup:    [ ]
Detect hard drives:     [ ]
Partition hard drives:  [ ]
Install base system:    [ ]
Install tasks:          [ ]
Install boot loader:    [ ]
Overall install:        [ ]


The installer was prepared by creating a FIT to boot from u-boot:

mkimage -f auto -A arm -O linux -T kernel -C none \
 -a 0x80000000 -e 0x80000000 -d vmlinuz \
 -b aspeed-ast2600-evb.dtb -i initrd.gz \

And then tftp booted from the vendor u-boot, using a serial console. The
installer starts fine but fails when detecting network.

The system uses the ftgmac100 network device, and requires the
aspeed_mdio module to be present too. The mdio module is not included in
the installer so network detection fails.

In the past this could be worked around by booting with an upstream
kernel with all the required drivers built in, however now d-i will fail
the install when it cannot find the kernel version in the apt archives.
Being able to override this behaviour would be useful for installing on
systems that don't yet have full kernel support in the Debian archive.

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