If you are using r8168-dkms because the in-kernel r8169 does not support your NIC or is not working properly, please check the following: * Have you tried a more recent kernel? The problem may be fixed there already. In that case the current r8169 driver may be ported back to an older kernel - please report a bug against the Debian kernel package where r8169 is not working as expected. * If no version of the in-kernel driver r8169 supports your NIC, please report this to the r8169 maintainers, so that this can be fixed: To: Realtek linux nic maintainers To: Francois Romieu Cc: netdev@vger.kernel.org You may also wish to open a Debian bug report (against the src:linux package) and Cc that. If you want to switch back from r8168-dkms to the in-kernel r8169 driver it is necessary to purge the r8168-dkms package, otherwise the blacklist for r8169 won't be removed.