Recent Linux/OpenWrt on the IXP4xx-based Actiontec MI424-WR which includes revisions A, C and D
(Last boot 2025-06-23 with the v6.16-rc1 kernel, using OpenWRT as rootfs)

Actiontec MI424WR

Refer to OpenWrt Actiontec MI424WR page for the bulk of device information.

Notices where I had to deviate from the OpenWrt documentation:

Files

Getting OpenWRT up on it

Installing OpenWrt currently requires UART serial console access

LuCI running on the MI424WR

Info