Can't connect to ethernet connection on Realtek RTL8111/8168/8411

This morning I woke up and my pc wasn't using the nvidia driver, (usually this happens after a kernel update, I'm not sure whether the update actually happened). Since the nvidia driver were already broke, I decided to run all the updates. I also tried to switch to nvidia drivers again, so I went into software & updates, additional drivers and selected the nvidia ones. After getting an error I decided to reboot anyway because the update required it.

After rebooting, my Ethernet connection wasn't working anymore. I tried to run the pc with the previous kernel, but the system doesn't boot up and shows:

rtl_rxtx_empty_cond == 0 (loop: 42, delay: 100)
rtl_rxtx_empty_cond == 0 (loop: 42, delay: 100)
...

some log that may be useful:

ifconfig 
enp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether b4:2e:99:a6:c0:98  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 1953  bytes 147371 (147.3 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1953  bytes 147371 (147.3 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 ``` 

sudo lshw -C network
  *-network                 
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: enp4s0
       version: 0c
       serial: b4:2e:99:a6:c0:98
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.8.0-55-generic duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:33 ioport:f000(size=256) memory:f7500000-f7500fff memory:f2200000-f2203fff

Thank you and let me know if something else may be useful. I tried all the standard stuff like rebooting both pc and modem, deleting connection etc