LinuxCNC on Linux Mint Debian Edition 6

*-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: enp3s0
       version: 15
       serial: 68:1d:ef:38:f0:48
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.051.02-NAPI duplex=full latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:19 ioport:3000(size=256) memory:80404000-80404fff memory:80400000-80403fff

sudo modprobe -r alx && sudo modprobe alx && systemctl restart NetworkManager

sudo modprobe -r r8169 && sudo modprobe r8169 && sudo systemctl restart

DKMS make.log for r8168-8.051.02 for kernel 6.6.13+bpo-amd64 (x86_64)
Thu Apr 18 17:14:23 CEST 2024
make: Entering directory '/usr/src/linux-headers-6.6.13+bpo-amd64'
  CC [M]  /var/lib/dkms/r8168/8.051.02/build/r8168_n.o
  CC [M]  /var/lib/dkms/r8168/8.051.02/build/r8168_asf.o
  CC [M]  /var/lib/dkms/r8168/8.051.02/build/rtl_eeprom.o
  CC [M]  /var/lib/dkms/r8168/8.051.02/build/rtltool.o
/var/lib/dkms/r8168/8.051.02/build/r8168_n.c: In function ‘r8168_csum_workaround’:
/var/lib/dkms/r8168/8.051.02/build/r8168_n.c:29208:24: error: implicit declaration of function ‘skb_gso_segment’; did you mean ‘skb_gso_reset’? [-Werror=implicit-function-declaration]
29208 |                 segs = skb_gso_segment(skb, features);
      |                        ^~~~~~~~~~~~~~~
      |                        skb_gso_reset
/var/lib/dkms/r8168/8.051.02/build/r8168_n.c:29208:22: warning: assignment to ‘struct sk_buff *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
29208 |                 segs = skb_gso_segment(skb, features);
      |                      ^
cc1: some warnings being treated as errors
make[2]: *** [/usr/src/linux-headers-6.6.13+bpo-common/scripts/Makefile.build:248: /var/lib/dkms/r8168/8.051.02/build/r8168_n.o] Error 1
make[1]: *** [/usr/src/linux-headers-6.6.13+bpo-common/Makefile:1938: /var/lib/dkms/r8168/8.051.02/build] Error 2
make: *** [/usr/src/linux-headers-6.6.13+bpo-common/Makefile:246: __sub-make] Error 2
make: Leaving directory '/usr/src/linux-headers-6.6.13+bpo-amd64'