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Internal NIC fails, PCIe NIC fails, no NIC works! [SOLVED]
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audiodef
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Joined: 06 Jul 2005
Posts: 6308
Location: /usr/lib64/lv2

PostPosted: Sun Jun 24, 2018 12:29 am    Post subject: Internal NIC fails, PCIe NIC fails, no NIC works! [SOLVED] Reply with quote

I have a Lenovo H50 desktop with Gentoo on it (Gentoo Studio, specifically.) It seemed like its motherboard NIC failed, so I put in a PCIe replacement. It worked OOTB but then failed on the next reboot, after I did a world update and kernel update. I rebooted with the previous kernel when it worked after I plugged it in, but no luck. I disabled the internal NIC in the BIOS, no luck.

What happens is nm-applet/Networkmanager takes several seconds to connect, says it's connected, but there is no network. Doing a ping results in "network unreachable."

I kind of doubt this is a software issue. If I take another Gentoo Studio machine upstairs and plug it into the eth port in the wall, it works, and all my Gentoo Studio machines vary not at all in their network setups.

So... what possible type of hardware booboo could be going on?

EDIT: Not really solved. I'm just calling "hardware failure" on this one, possibly motherboard.
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Last edited by audiodef on Fri Jun 29, 2018 3:45 pm; edited 2 times in total
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NeddySeagoon
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Joined: 05 Jul 2003
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PostPosted: Sun Jun 24, 2018 12:00 pm    Post subject: Reply with quote

audiodef,

What parts do you have in common?
The cat5 patch cable perhaps. It failed, you disturbed it, it worked ... briefly.
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Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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audiodef
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Joined: 06 Jul 2005
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Location: /usr/lib64/lv2

PostPosted: Sun Jun 24, 2018 1:59 pm    Post subject: Reply with quote

I tried replacing the cable, too. If it didn't work, Networkmanager wouldn't claim it connected successfully. Another computer plugged into the same wall port works. This same computer plugged into another wall port in a different room still claims to be connected but actually isn't.
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NeddySeagoon
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PostPosted: Sun Jun 24, 2018 3:06 pm    Post subject: Reply with quote

audiodef,

Please pastebin dmesg from the isolated box.
Also post the output of
Code:
route -n
and
Code:
ifconfig -a

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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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audiodef
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Joined: 06 Jul 2005
Posts: 6308
Location: /usr/lib64/lv2

PostPosted: Sun Jun 24, 2018 4:15 pm    Post subject: Reply with quote

I went into BIOS, turned off PXE for the internal NIC, re-enabled the NIC (I disabled it earlier while troubleshooting this issue) and now the internal NIC works while the PCIe card does not.

If it goes wonky again, I will follow up with dmesg, route and ifconfig. Thanks, Neddy, appreciate it. :)
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audiodef
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Location: /usr/lib64/lv2

PostPosted: Mon Jun 25, 2018 2:03 am    Post subject: Reply with quote

It went wonky again. As it has for some time now, even if it works, it eventually just stops working while Networkmanager says it's still working. I have to disconnect and reconnect in Networkmanager. This is a problem when I leave updates running or when I need to ssh to this machine.

dmesg: https://pastebin.com/kZrPfuEU

route -n
Code:

Studio_B ~ # route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 enp1s0
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 enp1s0


If it's not working, there's no route -n table.

ifconfig -a
Code:

Studio_B ~ # ifconfig -a
bond0: flags=5122<BROADCAST,MASTER,MULTICAST>  mtu 1500
        ether 16:fa:d2:52:c8:b2  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 00:01:6c:d3:e1:01  txqueuelen 1000  (Ethernet)
        RX packets 15792  bytes 1915922 (1.8 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 697  bytes 144612 (141.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp4s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 00:1b:21:a5:10:94  txqueuelen 1000  (Ethernet)
        RX packets 56  bytes 10609 (10.3 KiB)
        RX errors 0  dropped 6  overruns 0  frame 0
        TX packets 20  bytes 3272 (3.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 17  memory 0xfe8c0000-fe8e0000 

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp0s18f2u4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.15  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::9eef:d5ff:feff:47b5  prefixlen 64  scopeid 0x20<link>
        inet6 2601:151:8300:ab10:ecd7:14b1:7378:3fd7  prefixlen 64  scopeid 0x0<global>
        ether 9c:ef:d5:ff:47:b5  txqueuelen 1000  (Ethernet)
        RX packets 1091  bytes 626841 (612.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 773  bytes 109433 (106.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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