After update Linux Mint Ethernet Port not works anymore

Hello everyone

My NitroPC 1 (Linux Mint Cinnamon) stops using the Ethernet-Port. Is it broken (and if can it be repaired/changed?) or is it another problem.
This is what I found out but I’m no Expert:

xxx@xxx-Nitro:~$ lspci

00:00.0 Host bridge: Intel Corporation Comet Lake-U v1 4c Host Bridge/DRAM Controller (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0c)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem
00:14.0 USB controller: Intel Corporation Comet Lake PCH-LP USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH-LP Shared SRAM
00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller
00:1c.0 PCI bridge: Intel Corporation Device 02bf (rev f0)
00:1d.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #10 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #13 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Comet Lake PCH-LP LPC Premium Controller/eSPI Controller
00:1f.3 Audio device: Intel Corporation Comet Lake PCH-LP cAVS
00:1f.4 SMBus: Intel Corporation Comet Lake PCH-LP SMBus Host Controller
00:1f.5 Serial bus controller: Intel Corporation Comet Lake SPI (flash) Controller
01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
03:00.0 Non-Volatile memory controller: Micron/Crucial Technology P2 NVMe PCIe SSD (rev 01)

xxx@xxx-Nitro:~$ lspci
00:00.0 Host bridge: Intel Corporation Comet Lake-U v1 4c Host Bridge/DRAM Controller (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0c)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem
00:14.0 USB controller: Intel Corporation Comet Lake PCH-LP USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH-LP Shared SRAM
00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller
00:1c.0 PCI bridge: Intel Corporation Device 02bf (rev f0)
00:1d.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #10 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #13 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Comet Lake PCH-LP LPC Premium Controller/eSPI Controller
00:1f.3 Audio device: Intel Corporation Comet Lake PCH-LP cAVS
00:1f.4 SMBus: Intel Corporation Comet Lake PCH-LP SMBus Host Controller
00:1f.5 Serial bus controller: Intel Corporation Comet Lake SPI (flash) Controller
01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
03:00.0 Non-Volatile memory controller: Micron/Crucial Technology P2 NVMe PCIe SSD (rev 01)

xxx@xxx-Nitro:~$ inxi -xxxn
Network:
Device-1: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter
vendor: Rivet Networks Killer Wireless-n/a/ac 1535 driver: ath10k_pci
v: kernel pcie: speed: 2.5 GT/s lanes: 1 bus-ID: 01:00.0
chip-ID: 168c:003e class-ID: 0280
IF: wlp1s0 state: down mac: 9c:b6:d0:c2:87:f1
IF-ID-1: pan1 state: down mac: 1e:d1:89:e4:19:91
xxx@xxx-Nitro:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0cf3:e300 Qualcomm Atheros Communications QCA61x4 Bluetooth 4.0
Bus 001 Device 003: ID 046a:c093 Cherry GmbH CHERRY Wireless Device
Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 005: ID 0930:0b0e Toshiba Corp. External HDD
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub