A Realtek Ethernet Controller was on my old PC and it is on my new
MinisForum MC560 PC and it is on my old Lenovo laptop. My old PC had an
Intel AX200 wireless interface; my old Lenovo laptop has a Realtek
wireless interface; my new PC has a MEDIATEK wireless interface. So
there seems to be nothing in common between the problem PCs (old PC &
new PC) which the Lenovo laptop has, except that the problem PCs are AMD
Ryzen processors and the Lenovo laptop is a Pentium 1 processor!

My new PC doesn't even have WireGuard on it whereas my old PC had
WireGuard on it, as I've decided to use a Raspberry Pi model 4 B for
that.

Here is network details for new PC:
john@Desktop:~$ 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@0000:01:00.0
       logical name: eno1
       version: 15
       serial: 58:47:ca:70:a0:ea
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix 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=5.19.0-45-generic duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 
latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:24 ioport:f000(size=256) memory:fcf04000-fcf04fff 
memory:fcf00000-fcf03fff
  *-network
       description: Wireless interface
       product: MEDIATEK Corp.
       vendor: MEDIATEK Corp.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlp2s0
       version: 00
       serial: 10:6f:d9:cf:d1:69
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm bus_master cap_list ethernet physical 
wireless
       configuration: broadcast=yes driver=mt7921e 
driverversion=5.19.0-45-generic firmware=____010000-20220209150915 
ip=192.168.1.110 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:67 memory:e0300000-e03fffff memory:e0400000-e0403fff 
memory:e0404000-e0404fff

john@Desktop:~$ ifconfig
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 58:47:ca:70:a0:ea  txqueuelen 1000  (Ethernet)
        RX packets 79903  bytes 6374933 (6.3 MB)
        RX errors 0  dropped 35  overruns 0  frame 0
        TX packets 3769  bytes 871473 (871.4 KB)
        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 28449  bytes 3223428 (3.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 28449  bytes 3223428 (3.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.110  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::d63e:3edb:8f82:6f7f  prefixlen 64  scopeid 0x20<link>
        ether 10:6f:d9:cf:d1:69  txqueuelen 1000  (Ethernet)
        RX packets 2172914  bytes 1928088175 (1.9 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 666334  bytes 168574947 (168.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-firmware in Ubuntu.
https://bugs.launchpad.net/bugs/2022826

Title:
  Ethernet hangs

Status in linux-firmware package in Ubuntu:
  New

Bug description:
  I'm now getting my wired (i.e. Ethernet) connection hanging on trying
  to connect. I've tried switching ports (on the router) and using a
  different cable, but still the same.

  ifconfig shows for Ethernet:
  enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
  ether 50:eb:f6:ef:a4:e6 txqueuelen 1000 (Ethernet)
  RX packets 2779 bytes 250524 (250.5 KB)
  RX errors 0 dropped 1 overruns 0 frame 0
  TX packets 355 bytes 72171 (72.1 KB)
  TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

  sudo lshw -C enp2s0 shows nothing

  lspci -nn shows for Ethernet: 02:00.0 Ethernet controller [0200]:
  Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125]
  (rev 05)

  I found a web page: https://tutorialforlinux.com/2021/05...based-systems/
  I followed the instructions and installed realtek-r8125-dkms package OK. On 
rebooting, I followed the instructed procedure (shown when installing the 
package) of creating a password and then entering it when requested on the 
reboot. But still same problem. Any ideas what to do?
  PS I've switched Wi-Fi on (though I'd prefer to use Ethernet, as my Wi-Fi is 
a little flaky due to walls) in order to post this question.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: linux-firmware 20220329.git681281e4-0ubuntu3.13
  ProcVersionSignature: Ubuntu 5.19.0-43.44~22.04.1-generic 5.19.17
  Uname: Linux 5.19.0-43-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CRDA: N/A
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Jun  3 07:29:15 2023
  Dependencies: firmware-sof-signed 2.0-1ubuntu4.1
  InstallationDate: Installed on 2022-08-21 (285 days ago)
  InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
  MachineType: ASUSTeK COMPUTER INC. MINIPC PN50-E1
  PackageArchitecture: all
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-43-generic 
root=UUID=1d99d177-09b2-43e7-b6c1-451d081353f8 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.19.0-43-generic N/A
   linux-backports-modules-5.19.0-43-generic  N/A
   linux-firmware                             20220329.git681281e4-0ubuntu3.13
  SourcePackage: linux-firmware
  UpgradeStatus: Upgraded to jammy on 2022-10-06 (239 days ago)
  dmi.bios.date: 03/18/2021
  dmi.bios.release: 4.5
  dmi.bios.vendor: ASUSTeK COMPUTER INC.
  dmi.bios.version: 0405
  dmi.board.asset.tag: Default string
  dmi.board.name: PN50-E1
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 35
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: 
dmi:bvnASUSTeKCOMPUTERINC.:bvr0405:bd03/18/2021:br4.5:svnASUSTeKCOMPUTERINC.:pnMINIPCPN50-E1:pvr0405:rvnASUSTeKCOMPUTERINC.:rnPN50-E1:rvrTobefilledbyO.E.M.:cvnDefaultstring:ct35:cvrDefaultstring:sku:
  dmi.product.family: Vivo PC
  dmi.product.name: MINIPC PN50-E1
  dmi.product.version: 0405
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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