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**GreyGeek** · Apr 27, 2022, 07:51 PM

You haven't given us any information that we can work with. Make and model of your laptop? Type of Ethernet chip?
You can use "sudo lshw" in a Konsole and paste the output into a "" box.

**TwoFistedJustice** · Apr 27, 2022, 08:28 PM

Code:

ares                         
   description: Notebook
   product: 20F5S0X506 (LENOVO_MT_20F5_BU_Think_FM_ThinkPad X260)
   vendor: LENOVO
   version: ThinkPad X260
   serial: PC0C3NKK
   width: 64 bits
   capabilities: smbios-2.8 dmi-2.8 smp vsyscall32
   configuration: administrator_password=disabled chassis=notebook family=ThinkPad X260 power-on_password=disabled sku=LENOVO_MT_20F5_BU_Think_FM_ThinkPad X260 uuid=4C8F958E-7D2E-B211-A85C-B26B088C9D0B
 *-core
      description: Motherboard
      product: 20F5S0X506
      vendor: LENOVO
      physical id: 0
      version: SDK0J40705 WIN
      serial: L1HF63405HS
      slot: Not Available
    *-cache:0
         description: L1 cache
         physical id: 3
         slot: L1 Cache
         size: 64KiB
         capacity: 64KiB
         capabilities: synchronous internal write-back data
         configuration: level=1
    *-cache:1
         description: L1 cache
         physical id: 4
         slot: L1 Cache
         size: 64KiB
         capacity: 64KiB
         capabilities: synchronous internal write-back instruction
         configuration: level=1
    *-cache:2
         description: L2 cache
         physical id: 5
         slot: L2 Cache
         size: 512KiB
         capacity: 512KiB
         capabilities: synchronous internal write-back unified
         configuration: level=2
    *-cache:3
         description: L3 cache
         physical id: 6
         slot: L3 Cache
         size: 3MiB
         capacity: 3MiB
         capabilities: synchronous internal write-back unified
         configuration: level=3
    *-cpu
         description: CPU
         product: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz
         vendor: Intel Corp.
         physical id: 7
         bus info: cpu@0
         version: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz
         serial: None
         slot: U3E1
         size: 2481MHz
         capacity: 4005MHz
         width: 64 bits
         clock: 100MHz
         capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc art arch_perfmon pebs bts rep_goo
d nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fau
lt epb invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md
_clear flush_l1d cpufreq
         configuration: cores=2 enabledcores=2 threads=4
    *-memory
         description: System Memory
         physical id: 8
         slot: System board or motherboard
         size: 16GiB
       *-bank
            description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
            product: 16ATF2G64HZ-2G3E2
            vendor: Micron
            physical id: 0
            serial: 182A3868
            slot: ChannelA-DIMM0
            size: 16GiB
            width: 64 bits
            clock: 2133MHz (0.5ns)
    *-firmware
         description: BIOS
         vendor: LENOVO
         physical id: b
         version: R02ET71W (1.44 )
         date: 05/08/2019
         size: 128KiB
         capacity: 16MiB
         capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppy720 int5printscreen int9keyboard int14serial int17printer int10video acpi usb biosbootspecification uefi
    *-pci
         description: Host bridge
         product: Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers
         vendor: Intel Corporation
         physical id: 100
         bus info: pci@0000:00:00.0
         version: 08
         width: 32 bits
         clock: 33MHz
         configuration: driver=skl_uncore
         resources: irq:0
       *-display
            description: VGA compatible controller
            product: Skylake GT2 [HD Graphics 520]
            vendor: Intel Corporation
            physical id: 2
            bus info: pci@0000:00:02.0
            version: 07
            width: 64 bits
            clock: 33MHz
            capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
            configuration: driver=i915 latency=0
            resources: irq:126 memory:f0000000-f0ffffff memory:e0000000-efffffff ioport:e000(size=64) memory:c0000-dffff
       *-usb
            description: USB controller
            product: Sunrise Point-LP USB 3.0 xHCI Controller
            vendor: Intel Corporation
            physical id: 14
            bus info: pci@0000:00:14.0
            version: 21
            width: 64 bits
            clock: 33MHz
            capabilities: pm msi xhci bus_master cap_list
            configuration: driver=xhci_hcd latency=0
            resources: irq:122 memory:f1220000-f122ffff
          *-usbhost:0
               product: xHCI Host Controller
               vendor: Linux 5.13.0-40-generic xhci-hcd
               physical id: 0
               bus info: usb@1
               logical name: usb1
               version: 5.13
               capabilities: usb-2.00
               configuration: driver=hub slots=12 speed=480Mbit/s
             *-usb:0
                  description: USB hub
                  product: Lenovo ThinkPad Dock
                  vendor: LENOVO
                  physical id: 4
                  bus info: usb@1:4
                  version: 50.40
                  capabilities: usb-2.10
                  configuration: driver=hub slots=4 speed=480Mbit/s
                *-usb:0
                     description: Mouse
                     product: Lenovo USB Optical Mouse
                     vendor: Logitech
                     physical id: 2
                     bus info: usb@1:4.2
                     version: 63.00
                     capabilities: usb-2.00
                     configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
                *-usb:1
                     description: Keyboard
                     product: Natural
                     vendor: Microsoft
                     physical id: 3
                     bus info: usb@1:4.3
                     version: 1.73
                     capabilities: usb-2.00
                     configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
                *-usb:2
                     description: USB hub
                     product: Lenovo ThinkPad Dock
                     vendor: Lenovo
                     physical id: 4
                     bus info: usb@1:4.4
                     version: 0.01
                     serial: Rev1.2
                     capabilities: usb-2.00
                     configuration: driver=hub maxpower=2mA slots=3 speed=480Mbit/s
                   *-usb
                        description: Mass storage device
                        product: Ultra Fit
                        vendor: SanDisk
                        physical id: 3
                        bus info: usb@1:4.4.3
                        version: 1.00
                        serial: 4C531001520220117502
                        capabilities: usb-2.10 scsi
                        configuration: driver=usb-storage maxpower=224mA speed=480Mbit/s
             *-usb:1
                  description: Bluetooth wireless interface
                  vendor: Intel Corp.
                  physical id: 7
                  bus info: usb@1:7
                  version: 0.01
                  capabilities: bluetooth usb-2.00
                  configuration: driver=btusb maxpower=100mA speed=12Mbit/s
             *-usb:2
                  description: Video
                  product: Integrated Camera
                  vendor: SunplusIT Inc
                  physical id: 8
                  bus info: usb@1:8
                  version: 0.12
                  capabilities: usb-2.00
                  configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
          *-usbhost:1
               product: xHCI Host Controller
               vendor: Linux 5.13.0-40-generic xhci-hcd
               physical id: 1
               bus info: usb@2
               logical name: usb2
               version: 5.13
               capabilities: usb-3.00
               configuration: driver=hub slots=6 speed=5000Mbit/s
             *-usb
                  description: USB hub
                  product: Lenovo ThinkPad Dock
                  vendor: LENOVO
                  physical id: 4
                  bus info: usb@2:4
                  version: 50.41
                  capabilities: usb-3.00
                  configuration: driver=hub slots=4 speed=5000Mbit/s
       *-generic
            description: Signal processing controller
            product: Sunrise Point-LP Thermal subsystem
            vendor: Intel Corporation
            physical id: 14.2
            bus info: pci@0000:00:14.2
            version: 21
            width: 64 bits
            clock: 33MHz
            capabilities: pm msi cap_list
            configuration: driver=intel_pch_thermal latency=0
            resources: irq:18 memory:f124a000-f124afff
       *-communication:0
            description: Communication controller
            product: Sunrise Point-LP CSME HECI #1
            vendor: Intel Corporation
            physical id: 16
            bus info: pci@0000:00:16.0
            version: 21
            width: 64 bits
            clock: 33MHz
            capabilities: pm msi bus_master cap_list
            configuration: driver=mei_me latency=0
            resources: irq:125 memory:f124b000-f124bfff
       *-communication:1
            description: Serial controller
            product: Sunrise Point-LP Active Management Technology - SOL
            vendor: Intel Corporation
            physical id: 16.3
            bus info: pci@0000:00:16.3
            version: 21
            width: 32 bits
            clock: 66MHz
            capabilities: msi pm 16550 cap_list
            configuration: driver=serial latency=0
            resources: irq:19 ioport:e080(size=8) memory:f124f000-f124ffff
       *-sata
            description: SATA controller
            product: Sunrise Point-LP SATA Controller [AHCI mode]
            vendor: Intel Corporation
            physical id: 17
            bus info: pci@0000:00:17.0
            version: 21
            width: 32 bits
            clock: 66MHz
            capabilities: sata msi pm ahci_1.0 bus_master cap_list
            configuration: driver=ahci latency=0
            resources: irq:123 memory:f1248000-f1249fff memory:f124e000-f124e0ff ioport:e088(size=8) ioport:e090(size=4) ioport:e060(size=32) memory:f124c000-f124c7ff
       *-pci:0
            description: PCI bridge
            product: Sunrise Point-LP PCI Express Root Port #1
            vendor: Intel Corporation
            physical id: 1c
            bus info: pci@0000:00:1c.0
            version: f1
            width: 32 bits
            clock: 33MHz
            capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
            configuration: driver=pcieport
            resources: irq:120 memory:f1100000-f11fffff
          *-generic
               description: Unassigned class
               product: RTS522A PCI Express Card Reader
               vendor: Realtek Semiconductor Co., Ltd.
               physical id: 0
               bus info: pci@0000:02:00.0
               version: 01
               width: 32 bits
               clock: 33MHz
               capabilities: pm msi pciexpress bus_master cap_list
               configuration: driver=rtsx_pci latency=0
               resources: irq:124 memory:f1100000-f1100fff
       *-pci:1
            description: PCI bridge
            product: Sunrise Point-LP PCI Express Root Port #3
            vendor: Intel Corporation
            physical id: 1c.2
            bus info: pci@0000:00:1c.2
            version: f1
            width: 32 bits
            clock: 33MHz
            capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
            configuration: driver=pcieport
            resources: irq:121 memory:f1000000-f10fffff
          *-network
               description: Wireless interface
               product: Wireless 8260
               vendor: Intel Corporation
               physical id: 0
               bus info: pci@0000:04:00.0
               logical name: wlp4s0
               version: 3a
               serial: 44:85:00:69:18:c9
               width: 64 bits
               clock: 33MHz
               capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
               configuration: broadcast=yes driver=iwlwifi driverversion=5.13.0-40-generic firmware=36.77d01142.0 8000C-36.ucode ip=192.168.50.121 latency=0 link=yes multicast=yes wireless=IEEE 802.11
               resources: irq:128 memory:f1000000-f1001fff
       *-isa
            description: ISA bridge
            product: Sunrise Point-LP LPC Controller
            vendor: Intel Corporation
            physical id: 1f
            bus info: pci@0000:00:1f.0
            version: 21
            width: 32 bits
            clock: 33MHz
            capabilities: isa bus_master
            configuration: latency=0
       *-memory UNCLAIMED
            description: Memory controller
            product: Sunrise Point-LP PMC
            vendor: Intel Corporation
            physical id: 1f.2
            bus info: pci@0000:00:1f.2
            version: 21
            width: 32 bits
            clock: 33MHz (30.3ns)
            configuration: latency=0
            resources: memory:f1244000-f1247fff
       *-multimedia
            description: Audio device
            product: Sunrise Point-LP HD Audio
            vendor: Intel Corporation
            physical id: 1f.3
            bus info: pci@0000:00:1f.3
            version: 21
            width: 64 bits
            clock: 33MHz
            capabilities: pm msi bus_master cap_list
            configuration: driver=snd_hda_intel latency=64
            resources: irq:127 memory:f1240000-f1243fff memory:f1230000-f123ffff
       *-serial
            description: SMBus
            product: Sunrise Point-LP SMBus
            vendor: Intel Corporation
            physical id: 1f.4
            bus info: pci@0000:00:1f.4
            version: 21
            width: 64 bits
            clock: 33MHz
            configuration: driver=i801_smbus latency=0
            resources: irq:16 memory:f124d000-f124d0ff ioport:efa0(size=32)
       *-network
            description: Ethernet interface
            product: Ethernet Connection I219-LM
            vendor: Intel Corporation
            physical id: 1f.6
            bus info: pci@0000:00:1f.6
            logical name: enp0s31f6
            version: 21
            serial: 50:7b:9d:c9:47:4a
            size: 100Mbit/s
            capacity: 1Gbit/s
            width: 32 bits
            clock: 33MHz
            capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
            configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.13.0-40-generic duplex=full firmware=0.13-3 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
            resources: irq:129 memory:f1200000-f121ffff
    *-pnp00:00
         product: PnP device PNP0c01
         physical id: 0
         capabilities: pnp
         configuration: driver=system
    *-pnp00:01
         product: PnP device PNP0c02
         physical id: 1
         capabilities: pnp
         configuration: driver=system
    *-pnp00:02
         product: PnP device PNP0b00
         physical id: 2
         capabilities: pnp
         configuration: driver=rtc_cmos
    *-pnp00:03
         product: PnP device LEN0071
         physical id: 9
         capabilities: pnp
         configuration: driver=i8042 kbd
    *-pnp00:04
         product: PnP device LEN2014
         physical id: a
         capabilities: pnp
         configuration: driver=i8042 aux
    *-pnp00:05
         product: PnP device INT3f0d
         physical id: c
         capabilities: pnp
         configuration: driver=system
    *-pnp00:06
         product: PnP device PNP0c02
         physical id: d
         capabilities: pnp
         configuration: driver=system
    *-pnp00:07
         product: PnP device PNP0c02
         physical id: e
         capabilities: pnp
         configuration: driver=system
    *-pnp00:08
         product: PnP device PNP0c31
         physical id: f
         capabilities: pnp
         configuration: driver=tpm_tis
    *-scsi:0
         physical id: 10
         logical name: scsi1
         capabilities: emulated
       *-disk
            description: ATA Disk
            product: SAMSUNG MZ7LN256
            physical id: 0.0.0
            bus info: scsi@1:0.0.0
            logical name: /dev/sda
            version: 3L6Q
            serial: S20HNAAH270017
            size: 238GiB (256GB)
            capabilities: gpt-1.00 partitioned partitioned:gpt
            configuration: ansiversion=5 guid=6da45da5-03f8-433a-a234-62ab9a54bba7 logicalsectorsize=512 sectorsize=512
          *-volume:0 UNCLAIMED
               description: Windows FAT volume
               vendor: mkfs.fat
               physical id: 1
               bus info: scsi@1:0.0.0,1
               version: FAT32
               serial: d047-5049
               size: 285MiB
               capacity: 286MiB
               capabilities: boot fat initialized
               configuration: FATs=2 filesystem=fat
          *-volume:1
               description: Linux swap volume
               vendor: Linux
               physical id: 2
               bus info: scsi@1:0.0.0,2
               logical name: /dev/sda2
               version: 1
               serial: e9e62685-26f0-41c1-945c-3ac8b455b920
               size: 21GiB
               capacity: 21GiB
               capabilities: nofs swap initialized
               configuration: filesystem=swap pagesize=4095
          *-volume:2
               description: EFI partition
               physical id: 3
               bus info: scsi@1:0.0.0,3
               logical name: /dev/sda3
               logical name: /
               logical name: /home
               logical name: /run/timeshift/backup
               serial: 6b20b696-9269-47bd-89d0-230b4e56400e
               capacity: 216GiB
               configuration: mount.fstype=btrfs mount.options=rw,relatime,ssd,space_cache,subvolid =5,subvol=/ state=mounted
    *-scsi:1
         physical id: 11
         logical name: scsi2
         capabilities: emulated scsi-host
         configuration: driver=usb-storage
       *-disk
            description: SCSI Disk
            product: Ultra Fit
            vendor: SanDisk
            physical id: 0.0.0
            bus info: scsi@2:0.0.0
            logical name: /dev/sdb
            version: 1.00
            serial: 4C531001520220117502
            size: 57GiB (62GB)
            capabilities: removable
            configuration: ansiversion=6 logicalsectorsize=512 sectorsize=512
          *-medium
               physical id: 0
               logical name: /dev/sdb
               size: 57GiB (62GB)
               capabilities: partitioned partitioned:dos
               configuration: signature=0060a891
             *-volume
                  description: Linux filesystem partition
                  physical id: 1
                  logical name: /dev/sdb1
                  capacity: 57GiB
                  capabilities: primary bootable
 *-battery:0
      product: 45N1773
      vendor: SANYO
      physical id: 1
      slot: Front
      capacity: 23200mWh
      configuration: voltage=11.1V
 *-battery:1
      product: 45N1775
      vendor: SANYO
      physical id: 2
      slot: Rear
      capacity: 23200mWh
      configuration: voltage=11.1V

**rab0171610** · Apr 27, 2022, 10:44 PM

I have a couple of consumer routers and I can't connect to either of them by ethernet wire.

Are you using the same ethernet cable in all scenarios? Have you tried using another cable? Cables and their connectors can go bad. If you tried it on two different routers, there is a likelihood that the cable and/or the network card are not in working condition.

I was previously able to connect but it has been increasingly unreliable and now I can't connect at all.

If you are trying to say that you noticed their was a gradual degradation of the connection over time and it eventually stopped:
This indicates a physical hardware problem. Sometimes network cards go bad and quit working, especially in laptops in my experience. If your wireless is working, it probably has nothing to do with the network stack (software related to networking on the computer) or the router(s) itself.
If after using another cable or if possible, another network card (usb dongle, etc), then move on to other possibilities. But the first troubleshooting priority is to make sure your cable and/or network card are physically working. If you do not have another cable, try to borrow one from a friend or neighbor.

Another option is to boot from a live Linux DVD/USB and try connecting to the router that way. If the problems also exist in the live DVD, then it points to a possible problem with the cable and/or network card. Alternatively, you could also achieve this by booting into Windows (if you are on a dual-boot system) to see if the problem can be replicated there.

You may need to seek help from a computer repair technician.
Good Luck!

**TwoFistedJustice** · Apr 27, 2022, 11:42 PM

I tried a different cable and no joy.

I ordered a usb ethernet adapter and will try that when it gets here next week.

Hardware question: is the ehternet port controlled by the Wireless LAN card?

**rab0171610** · Apr 28, 2022, 12:45 AM

Most network devices are either wired or wireless, meaning your laptop likely has two network cards, one wireless and one wired. This means it is unlikely that the Ethernet port on the wired adapter would be controlled by the wireless adapter. On a side note, if you can get the problem fixed, you will be able to get into the router and set it up with the cable attached. Most often, you will not be able to set up the router using a wireless connection. If your router is not setup but is accepting wireless connections, be aware that your wireless access point may be open at this time. If that is the case, anyone that can scan your access point can also connect and use your network. You do not want to be responsible to your ISP if someone uses the connection for nefarious purposes.

In the meantime, please consider seeing if you can get the wired connection working in either Windows (if that is possible) or a live DVD/USB image. Since you said it was working before, it likely is supported by your Linux installation and has appropriate drivers that work. If the issue is replicated in a different OS, you still cannot eliminate a hardware issue. If it works in a different OS, then it being a hardware issue can likely be eliminated. At that point, you would begin troubleshooting your software setup.

**rab0171610** · Apr 28, 2022, 01:27 AM

While you are waiting on the network adapter to arrive, can you please post the output of (see warning about IP address below first):

ip -s link

and

inxi -ni

The first command will output information similar to:

$ ip -s link
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
link/ether 18:c0:3c:74:3b:c1 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped missed mcast
9044204860 7047538 0 0 0 27823
TX: bytes packets errors dropped carrier collsns
645599711 4493095 0 0 0 0
altname enp3s0

The second command will provide output similar to:

$ inxi -ni
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 IF: enp1s0
state: up speed: 100 Mbps duplex: full mac: 1n:1c:0f:c9:72:3d IP v4: 192.0.10.997/16 type: noprefixroute
scope: global WAN IP: 999.999.9.98

Please do not post the last part of the last command that says WAN IP!!! We do not need to see your external IP address. Please do not copy and past that part of the output. Just post everything before it says WAN IP, like this:

$ inxi -ni
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 IF: enp1s0
state: up speed: 100 Mbps duplex: full mac: 1n:1c:0f:c9:72:3d IP v4: 192.0.10.997/16 type: noprefixroute
scope: global WAN IP:

If inxi returns command not found, just install it like so:

sudo apt install inxi

and run the command again.

**GreyGeek** · Apr 28, 2022, 06:57 AM

Your wifi:

*-network description: Wireless interface product: Wireless 8260 vendor: Intel Corporation physical id: 0 bus info: pci@0000:04:00.0 logical name: wlp4s0 version: 3a serial: 44:85:00:69:18:c9 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=5.13.0-40-generic firmware=36.77d01142.0 8000C-36.ucode ip=192.168.50.121 latency=0 link=yes multicast=yes wireless=IEEE 802.11 resources: irq:128 memory:f1000000-f1001fff

Your wired ethernet:

*-network description: Ethernet interface product: Ethernet Connection I219-LM vendor: Intel Corporation physical id: 1f.6 bus info: pci@0000:00:1f.6 logical name: enp0s31f6 version: 21 serial: 50:7b:9d:c9:47:4a size: 100Mbit/s capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.13.0-40-generic duplex=full firmware=0.13-3 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:129 memory:f1200000-f121ffff

What does "sudo rfkill" show?

**TwoFistedJustice** · Apr 28, 2022, 11:22 AM

Code:

~$ sudo rfkill
ID TYPE      DEVICE                   SOFT      HARD
0 bluetooth hci0                unblocked unblocked
1 wlan      phy0                unblocked unblocked
2 bluetooth tpacpi_bluetooth_sw unblocked unblocked

With Ethernet cable unplugged

Code:

~$ ip -s link 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   RX: bytes  packets  errors  dropped overrun mcast    
   72212      1077     0       0       0       0        
   TX: bytes  packets  errors  dropped carrier collsns  
   72212      1077     0       0       0       0        
2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
   link/ether 50:7b:9d:c9:47:4a brd ff:ff:ff:ff:ff:ff
   RX: bytes  packets  errors  dropped overrun mcast    
   0          0        0       0       0       0        
   TX: bytes  packets  errors  dropped carrier collsns  
   0          0        0       0       0       0        
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
   link/ether 44:85:00:69:18:c9 brd ff:ff:ff:ff:ff:ff
   RX: bytes  packets  errors  dropped overrun mcast    
   55456505   44806    0       0       0       0        
   TX: bytes  packets  errors  dropped carrier collsns  
   2102377    17313    0       0       0       0

Code:

~$ inxi -ni
Network:   Device-1: Intel Ethernet I219-LM driver: e1000e  
          IF: enp0s31f6 state: down mac: 50:7b:9d:c9:47:4a  
          Device-2: Intel Wireless 8260 driver: iwlwifi  
          IF: wlp4s0 state: up mac: 44:85:00:69:18:c9  
          IP v4: 192.168.50.121/24 type: dynamic noprefixroute scope: global  
          IP v6: fe80::8e5c:d300:c607:400/64 type: noprefixroute scope: link  
          WAN IP: 38.95.237.137

With Ethernet cable plugged and attempting to connect to router

Code:

~$ ip -s link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   RX: bytes  packets  errors  dropped overrun mcast    
   88499      1280     0       0       0       0        
   TX: bytes  packets  errors  dropped carrier collsns  
   88499      1280     0       0       0       0        
2: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
   link/ether 50:7b:9d:c9:47:4a brd ff:ff:ff:ff:ff:ff
   RX: bytes  packets  errors  dropped overrun mcast    
   0          0        0       0       0       0        
   TX: bytes  packets  errors  dropped carrier collsns  
   14763      95       0       0       0       0        
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
   link/ether 44:85:00:69:18:c9 brd ff:ff:ff:ff:ff:ff
   RX: bytes  packets  errors  dropped overrun mcast    
   56255099   46713    0       0       0       0        
   TX: bytes  packets  errors  dropped carrier collsns  
   2420358    19174    0       0       0       0

Code:

~$ inxi -ni
Network:   Device-1: Intel Ethernet I219-LM driver: e1000e  
          IF: enp0s31f6 state: up speed: 100 Mbps duplex: full mac: 50:7b:9d:c9:47:4a  
          IP v6: fe80::6442:54da:5ad1:cb35/64 type: tentative noprefixroute scope: link  
          Device-2: Intel Wireless 8260 driver: iwlwifi  
          IF: wlp4s0 state: up mac: 44:85:00:69:18:c9  
          IP v4: 192.168.50.121/24 type: dynamic noprefixroute scope: global  
          IP v6: fe80::8e5c:d300:c607:400/64 type: noprefixroute scope: link  
          WAN IP: ;; connection timed out; no servers could be reached

**rab0171610** · Apr 29, 2022, 12:00 AM

Well at least you have a driver listed
I219-LM driver: e1000e
Do you have a firewall installed or running?

**jlittle** · Apr 29, 2022, 02:11 AM

My desktop has the I219-LM with the e1000e driver.

Warning... a long story ... it might be wise to skip to the last paragraph.

This ethernet device has had periods of unreliability, after months of no problems. The connection just goes away for a while. The problem is a hardware fault which only some systems provoke. It seemed to be mostly manifested in server applications; I participated in a forum discussions with mostly server folks.

I can shorten how long it is down by disconnecting using the Networks applet, the reconnecting after about 30 seconds, but if I try that too soon it doesn't work.
It is much improved with the latest driver, though the driver can't fix it, just mitigate it.
It happens less often if it gets woken up regularly. I run

Code:

nohup ping -i 4 192.168.1.1 &>> ping.log &
disown

(192.168.1.1 is my router, the ping is a few ms). The log file is handy if a video is buffering, because I can check it to see if the pings are happening, and if they are the buffering is network congestion or a slow site.

I suggest installing "ethtool" if you haven't already got it, and running

Code:

ethtool -i enp0s31f6

This will show the version of the driver. For some reason the Linux kernel only has a driver from 2016, 3.2.6-k. The latest available is 3.8.7 (3.8.4 from the Intel download centre).

If you indeed only have the 3.2.6-k driver, the adapter's reliability will improve with the later drivers. These days, it is very easy to use it because someone's set it up on github: https://github.com/koljah-de/e1000e-dkms-debian. It has to be recompiled for every new kernel, and that github project sets up DKMS to do it automatically. It has worked flawlessly for over two years for me.

The early days with the driver meant recompiling manually on every new kernel, and then I learnt how to set up DKMS, which usually broke every new Kubuntu release. And the driver code got broken a few times by Linux header or compiler changes. But now with the e1000e-dkms-debian project it sails past release upgrades.

I have spent so much time stubbornly cajoling this POS. I would have been far better off just getting another NIC.

**rab0171610** · Apr 29, 2022, 10:13 AM

Now we might be getting somewhere . . . Very insightful Mr. Little!!!

**TwoFistedJustice** · Apr 29, 2022, 04:19 PM

Code:

~$ ethtool -i enp0s31f6
driver: e1000e
version: 5.13.0-40-generic
firmware-version: 0.13-3
expansion-rom-version:  
bus-info: 0000:00:1f.6
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

**rab0171610** · Apr 29, 2022, 06:45 PM

So it appears you are using the built in generic kernel driver for 5.13. I would suggest trying to install the proprietary Intel driver e1000e from the link that Mr. Little provided above.

**jlittle** · Apr 29, 2022, 08:37 PM

Originally posted by TwoFistedJustice View Post

Code:

~$ ethtool -i enp0s31f6
driver: e1000e
version: 5.13.0-40-generic
...

For some reason I can't understand, in 2020 a change was made to the kernel source for the intel network drivers to remove the actual driver version, and just report the kernel version. Totally frustrating for someone trying to compare the version with Intel's... The kernel git log shows (what appears to me to be) a lot of activity on the kernel source, even up to a few days ago, so maybe the comparison is not valid. So the ethtool output is not useful, and neither is that from modinfo. (On my main 21.10 install ethtool and modinfo give the version nicely, but on my 22.04 clean install they don't.)

Given all that activity on the driver in the kernel, conceivably 22.04 would run better for you.

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