[FS#3839] Xiaomi 4A Gigabit link speed auto negotiation

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Elmer Miroslav Mosher Golovin (mishamosher) 

Attached to Project - OpenWrt/LEDE Project
Summary - Xiaomi 4A Gigabit link speed auto negotiation
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details -  - Device problem occurs on

Xiaomi Mi Router 4A Gigabit Edition

 - Software versions of OpenWrt/LEDE release, packages, etc.

OpenWRT 21.02-rc2

 - Description

The link speed auto-negotiation is broken. I've a 1Gbps switch and a 4-lines ethernet cable (pins 1 2 3 6). It should be possible to achieve a max speed of 100Mbps full duplex. When I connect the switch to the WAN port of the router, the link speed shows up as 1Gbps full duplex (in the router).

Ethernet connectivity remains non-functional unless I set a proper speed and duplex (ex. ethtool -s wan speed 100 duplex full autoneg off).

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3839

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