Aquantia AQC100S stopped working after driver update on Windows

I have a Sonnet Solo10G SFP+ card that use to work just fine, till I updated to the latest Jan 2020 driver on Windows. This card officially supports Catalina OTB.

According to this thread updating to certain drivers on Windows turns off a few flags that makes the card lose functionality on macOS.

The card refuses to work on macOS. It is now Identifying as a 107S, instead of 100S (despite the PID/VID being the correct one) and while the ethernet shows up in system information, it will always show as disconnected.

I tried everything including:

  • Upgraded to latest firmware from Sonnet (Marvell site)
  • Reverting to older driver on Windows
  • downgrading/upgrading IONetworkingFamily.kext tried latest beta
  • Deleted all the preferences files
  • Switched from Clover to OC (after tweaking OC, I can feel things working a lot better)
  • Fresh install
  • tried a different identical card (I have two)
  • I even reverted back to an older disk image.
  • Changed slots
  • Upgraded to beta BIOS

Is there anyway I can get it to work again? It uses Aquantia AQC100S.

To be clear it works perfectly well on Windows and Linux.

Here are my specs (not sure if its relevant):

  • 9900k
  • Gigabyte z390 Wifi pro
  • Radeon RX 5700 XT 8 GB
  • Titan Ridge Thunderbolt
  • Fenvi T919 Wifi/BT
submitted by /u/MightyDillah
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