OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity High
  • Priority Very Low
  • Reported Version openwrt-21.02
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Elmer Miroslav Mosher Golovin - 30.05.2021

FS#3839 - Xiaomi 4A Gigabit link speed auto negotiation

- 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


Skrity commented on 02.06.2021 12:36

Reporting the same happening on mir3g v1 and redmi ac2100.
Possibly the same issue as in fs#3681.

At the moment fixing this in local.rc like this:

ethtool -s wan advertise 0x8

Both release candidates are affected, but latest 19.07 is not.

Stefanos Batsios commented on 02.06.2021 16:14

Reporting also the same. Tested on both rc1 and rc2 of 21.02
With some fast ethernet switches it works great, but with some others and some POE it does not.

Works great with older 19.07.

Skrity commented on 02.06.2021 17:36

a few bootlogs if they help

Stefanos Batsios commented on 04.06.2021 15:42

I just saw in source, this piece of code:

fixed-link {
			speed = <1000>;

Do you believe it has something to do with this particular issue?

Elmer Miroslav Mosher Golovin commented on 10.07.2021 20:08

The issue still happens on RC3.

csharper2005 commented on 23.11.2021 17:33

The issue still happens on 21.02.1

csharper2005 commented on 22.12.2021 15:06

Other mt7621 devices are also affected:
Beeline SmartBox Giga
D-Team Newifi D2


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