I gave up on this ever being fixed since it's existed since 2.6 and
went and bought some Realtek ethernet cards, no problems since.  But, you
can work around this bug by turning hardware offloading off if efficiency
isn't an issue.

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On Mon, 6 Jul 2020, Ted Gerold wrote:

> Date: Mon, 06 Jul 2020 22:41:11 -0000
> From: Ted Gerold <email address hidden>
> To: <email address hidden>
> Subject: [Bug 1766377] Re: Ethernet E1000 Controller Hangs
> 
> I am also experiencing this issue.
>
> Distribution: Ubuntu 20.04 LTS
> Kernel: 5.4.0-26-generic
> Hardware: NUC10i7FNH - 2TB SSD - 64GB RAM
>
> [128476.886034] e1000e 0000:00:1f.6 eno1: Detected Hardware Unit Hang:
>                  TDH                  <c8>
>                  TDT                  <fe>
>                  next_to_use          <fe>
>                  next_to_clean        <c7>
>                buffer_info[next_to_clean]:
>                  time_stamp           <101e8eb91>
>                  next_to_watch        <c8>
>                  jiffies              <101e8f598>
>                  next_to_watch.status <0>
>                MAC Status             <40080083>
>                PHY Status             <796d>
>                PHY 1000BASE-T Status  <3800>
>                PHY Extended Status    <3000>
>                PCI Status             <10>
> [128478.069750] e1000e 0000:00:1f.6 eno1: Reset adapter unexpectedly
>
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1766377
>
> Title:
>  Ethernet E1000 Controller Hangs
>
> Status in linux package in Ubuntu:
>  Expired
> Status in linux source package in Bionic:
>  Confirmed
>
> Bug description:
>       With Bionic kernel 4.15.0-15 and 4.15.0-17 I am experiencing periodic hanging of the LAN connection.  This is happening on an Asus X99-DELUX motherboard, controller specifications:
>  Intel® I218V, 1 x Gigabit LAN Controller(s)
>  Intel® I211-AT, 1 x Gigabit LAN
>  Dual Gigabit LAN controllers- 802.3az Energy Efficient Ethernet (EEE) appliance
>  Support Teaming Technology
>  ASUS Turbo LAN Utility
>  The CPU is an i7-6850 and it is configured with 128GB of DDR4 RAM.
>  This machine has a number of Qemu/KVM virtual guests and is using a software bridge to share the interface.
>  This did not happen with 17.10 and 4.13.0 kernel.  It is happening on multiple machines here.
>  Here are the messages from dmesg:
>  1016198.957850] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang:
>                     TDH                  <ea>
>                     TDT                  <2d>
>                     next_to_use          <2d>
>                     next_to_clean        <e9>
>                   buffer_info[next_to_clean]:
>                     time_stamp           <13c8d0008>
>                     next_to_watch        <ea>
>                     jiffies              <13c8d0880>
>                     next_to_watch.status <0>
>                   MAC Status             <80083>
>                   PHY Status             <796d>
>                   PHY 1000BASE-T Status  <3c00>
>                   PHY Extended Status    <3000>
>                   PCI Status             <10>
>  [1016200.942072] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang:
>                     TDH                  <ea>
>                     TDT                  <2d>
>                     next_to_use          <2d>
>                     next_to_clean        <e9>
>                   buffer_info[next_to_clean]:
>                     time_stamp           <13c8d0008>
>                     next_to_watch        <ea>
>                     jiffies              <13c8d1040>
>                     next_to_watch.status <0>
>                   MAC Status             <80083>
>                   PHY Status             <796d>
>                   PHY 1000BASE-T Status  <3c00>
>                   PHY Extended Status    <3000>
>                   PCI Status             <10>
>  [1016202.413607] e1000e 0000:00:19.0 eno1: Reset adapter unexpectedly
>  [1016202.413701] bridge0: port 1(eno1) entered disabled state
>  [1016202.413732] bridge0: topology change detected, propagating
>  [1016206.666676] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
>  [1016206.666708] bridge0: port 1(eno1) entered blocking state
>  [1016206.666712] bridge0: port 1(eno1) entered listening state
>  [1016216.750911] bridge0: port 1(eno1) entered learning state
>  [1016232.110291] bridge0: port 1(eno1) entered forwarding state
>  [1016232.110294] bridge0: topology change detected, sending tcn bpdu
>  [1017834.390579] cfg80211: Loading compiled-in X.509 certificates for regulatory database
>  [1017834.390770] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
>  [1017834.414792] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
>  [1017834.414794] cfg80211: failed to load regulatory.db
>  If there is any other information I can provide to aid in resolution, please contact me, <email address hidden>.  Thank you!
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 18.04
>  Package: linux-image-4.15.0-15-lowlatency 4.15.0-15.16
>  ProcVersionSignature: Ubuntu 4.15.0-15.16-lowlatency 4.15.15
>  Uname: Linux 4.15.0-15-lowlatency x86_64
>  ApportVersion: 2.20.9-0ubuntu6
>  Architecture: amd64
>  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/hwC1D3', '/dev/snd/hwC1D2', '/dev/snd/hwC1D1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D9p', '/dev/snd/pcmC1D8p', '/dev/snd/pcmC1D7p', '/dev/snd/pcmC1D3p', '/dev/snd/controlC1', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
>  CurrentDesktop: MATE
>  Date: Mon Apr 23 16:45:30 2018
>  HibernationDevice: RESUME=UUID=963cb206-8962-4fc0-82a1-fc4f02a9b5c5
>  InstallationDate: Installed on 2017-05-05 (353 days ago)
>  InstallationMedia: Ubuntu-MATE 17.04 "Zesty Zapus" - Release amd64 (20170412)
>  MachineType: ASUS All Series
>  ProcFB: 0 nouveaufb
>  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-15-lowlatency root=UUID=28825f5b-a6fd-4e09-982c-0513ae4d2842 ro quiet splash vt.handoff=1
>  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
>  RelatedPackageVersions:
>   linux-restricted-modules-4.15.0-15-lowlatency N/A
>   linux-backports-modules-4.15.0-15-lowlatency  N/A
>   linux-firmware                                1.173
>  RfKill:
>
>  SourcePackage: linux
>  UpgradeStatus: Upgraded to bionic on 2018-04-12 (11 days ago)
>  dmi.bios.date: 08/11/2017
>  dmi.bios.vendor: American Megatrends Inc.
>  dmi.bios.version: 1801
>  dmi.board.asset.tag: Default string
>  dmi.board.name: X99-E
>  dmi.board.vendor: ASUSTeK COMPUTER INC.
>  dmi.board.version: Rev 1.xx
>  dmi.chassis.asset.tag: Default string
>  dmi.chassis.type: 3
>  dmi.chassis.vendor: Default string
>  dmi.chassis.version: Default string
>  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1801:bd08/11/2017:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnX99-E:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
>  dmi.product.family: ASUS MB
>  dmi.product.name: All Series
>  dmi.product.version: System Version
>  dmi.sys.vendor: ASUS
>
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>