I'm still seeing this issue on the 4.15.0-39-generic kernel:

[467738.375137] e1000 0000:05:01.0 enp5s1f0: Detected Tx Unit Hang
                  Tx Queue             <0>
                  TDH                  <44>
                  TDT                  <44>
                  next_to_use          <44>
                  next_to_clean        <25>
                buffer_info[next_to_clean]
                  time_stamp           <106f70e55>
                  next_to_watch        <26>
                  jiffies              <106f70ff8>
                  next_to_watch.status <0>
[467740.391180] e1000 0000:05:01.0 enp5s1f0: Detected Tx Unit Hang
                  Tx Queue             <0>
                  TDH                  <44>
                  TDT                  <44>
                  next_to_use          <44>
                  next_to_clean        <25>
                buffer_info[next_to_clean]
                  time_stamp           <106f70e55>
                  next_to_watch        <26>
                  jiffies              <106f711f0>
                  next_to_watch.status <0>
[467742.407313] e1000 0000:05:01.0 enp5s1f0: Detected Tx Unit Hang
                  Tx Queue             <0>
                  TDH                  <44>
                  TDT                  <44>
                  next_to_use          <44>
                  next_to_clean        <25>
                buffer_info[next_to_clean]
                  time_stamp           <106f70e55>
                  next_to_watch        <26>
                  jiffies              <106f713e8>
                  next_to_watch.status <0>
[467744.423373] e1000 0000:05:01.0 enp5s1f0: Detected Tx Unit Hang
                  Tx Queue             <0>
                  TDH                  <44>
                  TDT                  <44>
                  next_to_use          <44>
                  next_to_clean        <25>
                buffer_info[next_to_clean]
                  time_stamp           <106f70e55>
                  next_to_watch        <26>
                  jiffies              <106f715e0>
                  next_to_watch.status <0>
[467745.319133] e1000 0000:05:01.0 enp5s1f0: Reset adapter

05:01.0 Ethernet controller: Intel Corporation 82546EB Gigabit Ethernet 
Controller (Copper) (rev 03)
        Subsystem: Intel Corporation PRO/1000 MT Dual Port Server Adapter
        Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 16
        Memory at f7220000 (64-bit, non-prefetchable) [size=128K]
        Memory at f71c0000 (64-bit, non-prefetchable) [size=256K]
        I/O ports at d040 [size=64]
        Expansion ROM at f7180000 [disabled] [size=256K]
        Capabilities: [dc] Power Management version 2
        Capabilities: [e4] PCI-X non-bridge device
        Capabilities: [f0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Kernel driver in use: e1000
        Kernel modules: e1000

05:01.1 Ethernet controller: Intel Corporation 82546EB Gigabit Ethernet 
Controller (Copper) (rev 03)
        Subsystem: Intel Corporation PRO/1000 MT Dual Port Server Adapter
        Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 17
        Memory at f7200000 (64-bit, non-prefetchable) [size=128K]
        Memory at f7140000 (64-bit, non-prefetchable) [size=256K]
        I/O ports at d000 [size=64]
        Expansion ROM at f7100000 [disabled] [size=256K]
        Capabilities: [dc] Power Management version 2
        Capabilities: [e4] PCI-X non-bridge device
        Capabilities: [f0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Kernel driver in use: e1000
        Kernel modules: e1000


This is a dual-port adapter, but I also saw the issue with the on-board i217 
chip too.

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https://bugs.launchpad.net/bugs/1766377

Title:
  Ethernet E1000 Controller Hangs

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