title: Acer G43T-AM3 notes x-toc-enable: true ...
This is similar to Gigabyte GA-G41M-ES2L but uses an Intel NIC rather than Realtek. Some problems with Linux on this NIC, on this board, with Libreboot, were observed; see:
That page (on notabug) has some notes about workarounds. It links to this:
This page has some guidance on how to either correct the checksum (in GbE config) or skip checksum validation in Linux, to get the onboard NIC working. Although it's talking about different hardware, the steps should be the same.
TODO: factory BIOS on this board works fine with the onboard NIC. study what that is doing