This question already has an answer here:
From what I read, wired internet should work out of the box during the Arch installation. However, I'm having difficulties. The dhcpcd service is running, but it says:
# systemctl status dhcpcd.service ... ... systemd: Started dhcpcd on all interfaces ... dhcpcd: enp5s0: waiting for carrier
The enp5s0 interface is down:
# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp5s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether e4:8d:04:ed:72:ce brd ff:ff:ff:ff:ff:ff
I tried to enable it but without any luck:
# ip link set enp5s0 up
There is no error or any other output, but the
ip addr status is unchanged. enp5s0 is still down.
# lspci -v ... 05:00.0 Ethernet controller Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03) ... Kernel driver in use: r8169 Kernel modules: r8169 # mesg | grep r8169 r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded r8169 0000:05:00.0: irq 45 for MSI/MSI-X r8169 0000:05:00.0: eth0: RTL8168d/8111d at ... r8169 0000:05:00.0: eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko] r8169 0000:05:00.0: enp5s0: link down
Maybe it has to do with systemd renaming of eth0 (here to enp5s0)?
I'm stuck. Is there a way to find out what
ip link set enp5s0 up does? As there is no error, I would assume that afterwards enp5s0 should be up.
UPDATE: Seems to be related to this problem Archlinux 2014.04 64bit and connectivity problem during instalation. I still haven't solved the problem, but I discovered that the wired LAN connection to my Fritzbox router is now broken on my machine. Beside with Arch Linux, it also stopped to work with my existing Windows installation on the same machine (though it worked fine, some hours ago).
If I plug the wired connection to another Ubuntu laptop, LAN works. I think, it has to do something with the router. Deleting the fixed IP assignment as in the other question, did not solve the issue, however.