Lost interernet on Desktop

mephostophilis · 2022-01-15 07:13:09

ping 8.8.8.8
ping: connect: Network is unreachable

ip  address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: enp3s0: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 74:d4:35:15:54:79 brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:95:84:11 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever

This output is blank

ip neighbor show

No router IP

ip route show
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

Set interface up does not help

sudo ip link set enp3s0 up

 ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 74:d4:35:15:54:79 brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:95:84:11 brd ff:ff:ff:ff:ff:ff

lspci -v for Ethernet:

03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
	Subsystem: Gigabyte Technology Co., Ltd Onboard Ethernet
	Flags: bus master, fast devsel, latency 0, IRQ 18
	I/O ports at d000 [size=256]
	Memory at f7800000 (64-bit, non-prefetchable) [size=4K]
	Memory at f2100000 (64-bit, prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: r8169
	Kernel modules: r8169

sudo dmesg | grep r8169
[sudo] password for nfour: 
[    4.024428] r8169 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
[    4.031708] libphy: r8169: probed
[    4.032149] r8169 0000:03:00.0 eth0: RTL8168evl/8111evl, 74:d4:35:15:54:79, XID 2c9, IRQ 36
[    4.032154] r8169 0000:03:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko]
[    4.253626] r8169 0000:03:00.0 enp3s0: renamed from eth0
[    5.416602] RTL8211E Gigabit Ethernet r8169-0-300:00: attached PHY driver (mii_bus:phy_addr=r8169-0-300:00, irq=MAC)
[    5.635103] r8169 0000:03:00.0 enp3s0: Link is Down
[   11.354808] r8169 0000:03:00.0: invalid VPD tag 0x00 (size 0) at offset 0; assume missing optional EEPROM
[ 3384.785122] RTL8211E Gigabit Ethernet r8169-0-300:00: attached PHY driver (mii_bus:phy_addr=r8169-0-300:00, irq=MAC)
[ 3385.020798] r8169 0000:03:00.0 enp3s0: Link is Down
[ 3391.590270] r8169 0000:03:00.0 enp3s0: Link is Up - 100Mbps/Full - flow control off

The desktop connects to the internet booting up with systemrescue CD and my laptop connects fine so there appears no hardware problems the desktop or router.

Last edited by mephostophilis (2022-01-15 07:14:22)

seth · 2022-01-15 09:07:33

Where does the virtual bridge come from (VPN?) and why doesn't it have a carrier (broken VPN?)?

mephostophilis · 2022-01-15 09:54:57

virbr0 is from Virtmanager it shows up even when there no guest running. I run VPNs in guest machines not that maters.

seth · 2022-01-15 09:59:12

It's the default route (and going nowhere), possibly because nothing brought up the enp3s0 NIC.

Set interface up does not help

You'll also have to either obtain a lease via dhcp or configure a static IP - what's supposed to configure the network and how?

find /etc/systemd -type l -exec test -f {} \; -print | awk -F'/' '{ printf ("%-40s | %s\n", $(NF-0), $(NF-1)) }' | sort -f

In doubt just runnning "sudo dhcpcd" will do.

If not, the filtered dmesg doesn't tell much, but https://archlinux.org/packages/community/x86_64/r8168/ might work better with the particualr chip.

Arch Linux

#1 2022-01-15 07:13:09

Lost interernet on Desktop

#2 2022-01-15 09:07:33

Re: Lost interernet on Desktop

#3 2022-01-15 09:54:57

Re: Lost interernet on Desktop

#4 2022-01-15 09:59:12

Re: Lost interernet on Desktop

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