[ 6.706478] libphy: r8169: probed
[ 6.706483] r8169 0000:05:00.0: realtek.ko not loaded, maybe it needs to be added to initramfs?
[ 6.713626] r8169: probe of 0000:05:00.0 failed with error -49
$ modinfo r8169
...
softdep: pre: realtek
So does it work for you if you add realtek to your /etc/modules?
$ echo realtek | sudo tee -a /etc/modules
$ sudo update-initramfs -u -k all && sudo reboot
[ 6.706478] libphy: r8169: probed
[ 6.706483] r8169 0000:05:00.0: realtek.ko not loaded, maybe it needs to be added to initramfs?
[ 6.713626] r8169: probe of 0000:05:00.0 failed with error -49
$ modinfo r8169
...
softdep: pre: realtek
So does it work for you if you add realtek to your /etc/modules?
$ echo realtek | sudo tee -a /etc/modules
$ sudo update-initramfs -u -k all && sudo reboot