Upgrading cubox-i Buster from Kernel 5.7.y to 5.8.y breaks ethernet

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Upgrading cubox-i Armbian Buster from kernel 5.7.x to Kernel 5.8.y breaks ethernet and I'm unable to get it connected again. Works fine again downgrading back to 5.7.y. This occurs on multiple cubox-i devices.


System diagnosis information will now be uploaded to http://ix.io/2zH6


dmesg | grep eth0
[    4.667327] fec 2188000.ethernet eth0: registered PHC device 0
[   22.369472] fec 2188000.ethernet eth0: Unable to connect to phy

wlan0: connected to sketch-wlan
        "Broadcom BCM4330"
        wifi (brcmfmac), 6C:AD:F8:1D:36:25, hw, mtu 1500
        ip4 default
eth0: unavailable
        ethernet (fec), D0:63:B4:00:87:DD, hw, mtu 1500

nmcli con
NAME              UUID                                  TYPE      DEVICE          
br-4ba53c1beb78   580cd8d0-4b87-432d-b072-7b2191fc3dc8  bridge    br-4ba53c1beb78
br-667404d55215   21ae2dad-0462-4880-98f2-8b56ae09dafa  bridge    br-667404d55215
br-7d46b681eda0   3dc1b651-2795-45fe-9821-7b33111d038c  bridge    br-7d46b681eda0
my-wlan           5d87696c-418b-404b-a6be-a85fd10c89cf  wifi      wlan0           
Armbian ethernet  0a5bb1f6-799d-476f-9fe4-2ecc7f4fe055  ethernet  --

nmcli con up 'Armbian ethernet'
Error: Connection activation failed: No suitable device found for this connection (device eth0 not available because device has no carrier).

sudo ip a
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether d0:63:b4:00:87:dd brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 6c:ad:f8:1d:36:25 brd ff:ff:ff:ff:ff:ff
    inet brd scope global dynamic noprefixroute wlan0
       valid_lft 85910sec preferred_lft 85910sec

sudo ip link set eth0 up
RTNETLINK answers: No such device


EDIT: this is link to armbianmonitor after downgrading back to 5.7.15 and ethernet (eth0) working once again


Edited by Armbian_User
Add link to diagnostics after downgrade back to working version
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On 10/4/2020 at 7:23 PM, Igor said:

I would suspect bug in Network Manager app since our Cubox-i in auto-testing facility - with Ubuntu Focal based Armbian - shows no troubles - no. 14:




Upgrading Network Manager by hand or switching to some other network tooling? Did you try clean build?

Hello Igor,


Thanks for your response. I've had a chance to try your suggestions. None worked for me.


Here is a link to the armbianmonitor from a new, clean install using a fresh download of Armbian_20.08.1_Cubox-i_buster_current_5.8.5.img.xz


and another after apt-get update && apt-get upgrade -y



Just to clarify, all my cubox-i's are the cubox-14x4 variant and all exhibit this issue.


Do you have any further suggestions I could try?



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