Trying to use I226-LM in Ubuntu 20.04 Kernel 5.10.104

[CasparTing]

We have developed a SBC using the I226-LM. The card  trying to get it not to work in Linux Kernel 5.10.104. 

Issue overview - Cannot get link using Ubuntu.

OS: Ubuntu 20.04.5 LTS

Kernel: 5.11.0-20-tegra 

1. Looking in dmesg for messages from the igc driver I see the following errors:

igc 0004:05:00.0: Adding to iommu group 9

igc 0004:05:00.0: enabling device (0000 -> 0002)
igc: probe of 0004:05:00.0 failed with error -2

igc 0004:06:00.0: Adding to iommu group 9

igc 0004:06:00.0: enabling device (0000 -> 0002)
igc: probe of 0004:06:00.0 failed with error -2

2. Looking in lspci message:

0004:05:00.0 Enthernet controller [0200]: Intel Corporation Device [8086:125b] (rev 04)

0004:06:00.0 Enthernet controller [0200]: Intel Corporation Device [8086:125b] (rev 04)

[Diego_INTEL]

Hello @CasparTing,

Thank you for contacting Intel Embedded Community.

You may check the compatibility list for the igc driver, it seems it is not supported with your setup.

https://www.intel.com/content/www/us/en/support/articles/000055236/ethernet-products/gigabit-ethernet-controllers-up-to-2-5gbe.html

Best regards,

@Diego_INTEL