Cannot Activate Wired Ethernet Connection

[MrJonas]

Hi everyone,

I cannot activate the wired ethernet - when i try, it shows a "connecting..." and then turns off again (very fast). The wireless connection works, but is not stable and slow due to a low signal from the router.
I have searched the forum and stack exchange but could not find a answer for this issue, though it seems I am not the only one to have it.
Since I am a linux noob when it comes to fixing stuff, I would appreciate any help!


I have a dual boot with Win10. On windows it works just fine.
On other questions the output for lshw -C network was requested, so mayb it helps:

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*-network               
       description: Wireless interface
       product: AR9462 Wireless Network Adapter
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: wlp7s0
       version: 01
       serial: 10:08:b1:a6:6a:2b
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=4.13.0-43-generic firmware=N/A ip=192.168.0.11 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:18 memory:d1600000-d167ffff memory:d1680000-d168ffff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:08:00.0
       logical name: enp8s0
       version: 0c
       serial: 20:6a:8a:9d:88:0e
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       resources: irq:31 ioport:3000(size=256) memory:d1500000-d1500fff memory:d1400000-d1403fff

lspci:

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07:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)

EDIT: When repeatedly clicking the activation button, it says: "Activation of Network Connection failed."

[JeremyB]

What is the result for

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lspci -nnk | grep -iA3 net

[MrJonas]

lspci -nnk | grep -iA3 net

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07:00.0 Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01)
	Subsystem: Foxconn International, Inc. AR9462 Wireless Network Adapter [105b:e07d]
	Kernel driver in use: ath9k
	Kernel modules: ath9k
08:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
	Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:0123]
	Kernel driver in use: r8169
	Kernel modules: r8168

[JeremyB]

Disable secure boot in BIOS and see if it works

[sgtor]

It sounds like an IP address conflict, meaning another device already has the same IP address as your computer. Are you using DHCP or entering the IP manually?

If I'm wrong about that then this could be your problem here:
Kernel driver in use: r8169
Kernel modules: r8168

Try the IP first though. If you're using DHCP there should be no problem.