I've used Windows, and decided to use Ubuntu and installed on my pc.
But Network is not working.
I've researched this problem, and reached following result.

```
$sudo lshw -C network
*-network UNCLAIMED       
       description: Ethernet controller
       product: 82579LM Gigabit Network Connection (Lewisville)
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       version: 04
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi cap_list
       configuration: latency=0
       resources: memory:f7c00000-f7c1ffff memory:f7c29000-f7c29fff ioport:f080(size=32)

```

```
$dmesg | grep -e e100
[    1.000006] e1000e: loading out-of-tree module taints kernel.
[    1.000119] e1000e: module verification failed: signature and/or required key missing - tainting kernel
[    1.000760] e1000e: Intel(R) PRO/1000 Network Driver - 3.6.0-NAPI
[    1.000761] e1000e: Copyright(c) 1999 - 2019 Intel Corporation.
[    1.000967] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[    1.105400] e1000e 0000:00:19.0: The NVM Checksum Is Not Valid
[    1.163676] e1000e: probe of 0000:00:19.0 failed with error -5
[  102.144745] e1000e: Intel(R) PRO/1000 Network Driver - 3.6.0-NAPI
[  102.144747] e1000e: Copyright(c) 1999 - 2019 Intel Corporation.
[  102.145080] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[  102.255649] e1000e 0000:00:19.0: The NVM Checksum Is Not Valid
[  102.319673] e1000e: probe of 0000:00:19.0 failed with error -5

```

```
$lspci -nnk | grep -A3 -Fe '[0200]'
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection (Lewisville) [8086:1502] (rev 04)
    Subsystem: Lenovo 82579LM Gigabit Network Connection (Lewisville) [17aa:4000]
    Kernel modules: e1000e
00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 04)

```

I've seen many similiar post like this, but any didn't solved.

I've tried to update driver, use bootutil, but nothing not work.
What's the solution?

bootutil's result is as follows.

```
$sudo ./bootutil64e -NIC 1 -defcfg
[sudo] password for hawkofsky: 
Connection to QV driver failed - please reinstall it!

Intel(R) Ethernet Flash Firmware Utility
BootUtil version 1.7.10.10
Copyright (C) 2003-2019 Intel Corporation

ERROR: -DEFCFG not allowed when combo image is present in flash

Port Network Address Location Series  WOL Flash Firmware                Version
==== =============== ======== ======= === ============================= =======
  1   4466E9BDB252     0:25.0 Gigabit YES FLASH Not Present

```

Update
======

```
$ sudo ./bootutil64e -NIC=1 -UP=Combo -FILE=BootIMG.FLB
Connection to QV driver failed - please reinstall it!

Intel(R) Ethernet Flash Firmware Utility
BootUtil version 1.7.10.10
Copyright (C) 2003-2019 Intel Corporation

Option ROM area in the flash is not supported for this device on port 1

Port Network Address Location Series  WOL Flash Firmware                Version
==== =============== ======== ======= === ============================= =======
  1   4466E9BDB252     0:25.0 Gigabit YES FLASH Not Present

```