r8168 driver is partially working after latest update in Testing branch - working on kernel 6.1 but not 6.5
R8168 driver not loaded on kernel 6.5 after Testing update 2023-09-22
I have seen this sort of error before for audio devices
r8169 0000:02:00.0: Unable to change power state from D3cold to D0, device inaccessible`
If the NIC is in hibernated state (D3cold) it might have been hibernated by fast startup feature on Windows OS
But if your system is not dual-booting, or fast startup is turned off, this may be a useful indicator for other users that a system requires r8168 driver