On Sat, Feb 27, 2021, at 2:31 PM, Samuel Sieb wrote:
> On 2/27/21 2:21 PM, Doug H. wrote:
> > On Sat, Feb 27, 2021, at 2:12 PM, Samuel Sieb wrote:
> >> On 2/27/21 9:50 AM, Doug H. wrote:
> >>> I am having an odd problem with my ethernet port. I assume this came
> >>> with a dnf update but that was some weeks ago so I can't help figure
> >>> out what update might have done it. When first discovered I think I
> >>> found that booting from an older kernel did not fix it. I assume that
> >>> the physical interface is not the problem since a physical "bounce"
> >>> always fixes it and it shows no other problems. To explain that...
> >>
> >> Given that an older kernel doesn't fix it, that suggests it might not
> >> be
> >> software.  How does it get in this state?  Is it random?  Does it stop
> >> working after a reboot or does it keep working after a reboot if it was
> >> working before?  What about a power cycle?
> > 
> > It does not seem random and it does not stop working while the OS is 
> > running except that it does not work after boot/reboot until the first 
> > unclip/pull/push. Oh, and it does stay up/working on resume from suspend 
> > (should have noted that one, seems important).
> > 
> > I did verify this morning that a cold boot does cause the problem. A reboot 
> > (warm) will also cause it. Note that the NIC lights do come on when the 
> > computer is turned on but then the lights go out at some point after the 
> > kernel is selected by grub. So it does seem that linux is doing it...
> 
> Run "sudo journalctl -b" to see if there are any relevant logs.  Also, 
> "sudo journalctl -fa" before replugging to see what happens.

In reply to the question about wire corrosion: I have pulled/pushed the cable a 
*lot* in working with this and it works very well when it is working. The same 
cable works great with the alternate NIC. And I did boot to "sysrescue" and 
found the NIC with good carrier.


On to answering the question from Samuel: 
I am not seeing much help in the "while bad" journal:

# grep enp5s0 journalctl-b.while_not_working.txt
Feb 27 14:52:58 wombat.wombatz.com kernel: r8169 0000:05:00.0 enp5s0: renamed 
from eth0
Feb 27 14:53:07 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466387.7201] manager: (enp5s0): new Ethernet device 
(/org/freedesktop/NetworkManager/Devices/2)
Feb 27 14:53:07 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466387.7216] device (enp5s0): state change: unmanaged -> unavailable 
(reason 'managed', sys-iface-state: 'external')
Feb 27 14:53:07 wombat.wombatz.com kernel: r8169 0000:05:00.0 enp5s0: Link is 
Down


Here is what happened when I did the pull/push of the cable (I marked the spot 
where the pull and push happened...

# journalctl -fa
-- Logs begin at Thu 2020-10-01 08:01:38 PDT. --
Feb 27 14:53:55 wombat.wombatz.com systemd[1]: dnfdaemon.service: Consumed 
4.964s CPU time.
Feb 27 14:53:58 wombat.wombatz.com chronyd[1331]: Selected source 212.26.18.43 
(2.fedora.pool.ntp.org)
Feb 27 14:53:58 wombat.wombatz.com chronyd[1331]: System clock TAI offset set 
to 37 seconds
Feb 27 14:53:59 wombat.wombatz.com chronyd[1331]: Selected source 
217.198.219.102 (2.fedora.pool.ntp.org)
Feb 27 14:54:05 wombat.wombatz.com systemd[1]: 
NetworkManager-dispatcher.service: Succeeded.
Feb 27 14:54:05 wombat.wombatz.com audit[1]: SERVICE_STOP pid=1 uid=0 
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 
msg='unit=NetworkManager-dispatcher comm="systemd" 
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Feb 27 14:54:10 wombat.wombatz.com systemd[1]: pcscd.service: Succeeded.
Feb 27 14:54:10 wombat.wombatz.com audit[1]: SERVICE_STOP pid=1 uid=0 
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=pcscd 
comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? 
res=success'
Feb 27 14:55:03 wombat.wombatz.com chronyd[1331]: Source 84.16.73.33 replaced 
with 2607:5300:201:3100::345c (2.fedora.pool.ntp.org)
Feb 27 14:55:03 wombat.wombatz.com chronyd[1331]: Selected source 184.105.182.7 
(2.fedora.pool.ntp.org)
Feb 27 14:56:12 wombat.wombatz.com systemd[1636]: Starting Mark boot as 
successful...
Feb 27 14:56:12 wombat.wombatz.com systemd[1636]: grub-boot-success.service: 
Succeeded.
Feb 27 14:56:12 wombat.wombatz.com systemd[1636]: Finished Mark boot as 
successful.

Here is the wire pull/push:

Feb 27 14:56:28 wombat.wombatz.com kernel: r8169 0000:05:00.0 enp5s0: Link is 
Up - 100Mbps/Full - flow control off
Feb 27 14:56:28 wombat.wombatz.com kernel: IPv6: ADDRCONF(NETDEV_CHANGE): 
enp5s0: link becomes ready
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5430] device (enp5s0): carrier: link connected
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5436] device (enp5s0): state change: unavailable -> disconnected 
(reason 'carrier-changed', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5451] policy: auto-activating connection 'Ether link to Pi' 
(837b199c-531d-3727-a66f-12a8096b570d)
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5460] device (enp5s0): Activation: starting connection 'Ether link 
to Pi' (837b199c-531d-3727-a66f-12a8096b570d)
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5463] device (enp5s0): state change: disconnected -> prepare 
(reason 'none', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5482] device (enp5s0): state change: prepare -> config (reason 
'none', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5493] device (enp5s0): state change: config -> ip-config (reason 
'none', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com avahi-daemon[1321]: Joining mDNS multicast 
group on interface enp5s0.IPv4 with address 192.168.11.4.
Feb 27 14:56:28 wombat.wombatz.com avahi-daemon[1321]: New relevant interface 
enp5s0.IPv4 for mDNS.
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5519] device (enp5s0): state change: ip-config -> ip-check (reason 
'none', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com avahi-daemon[1321]: Registering new address 
record for 192.168.11.4 on enp5s0.IPv4.
Feb 27 14:56:28 wombat.wombatz.com systemd[1]: Starting Network Manager Script 
Dispatcher Service...
Feb 27 14:56:28 wombat.wombatz.com systemd[1]: Started Network Manager Script 
Dispatcher Service.
Feb 27 14:56:28 wombat.wombatz.com audit[1]: SERVICE_START pid=1 uid=0 
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 
msg='unit=NetworkManager-dispatcher comm="systemd" 
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5799] device (enp5s0): state change: ip-check -> secondaries 
(reason 'none', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5803] device (enp5s0): state change: secondaries -> activated 
(reason 'none', sys-iface-state: 'managed')
Feb 27 14:56:28 wombat.wombatz.com NetworkManager[1316]: <info>  
[1614466588.5823] device (enp5s0): Activation: successful, device activated.
Feb 27 14:56:28 wombat.wombatz.com systemd[1]: iscsi.service: Unit cannot be 
reloaded because it is inactive.
Feb 27 14:56:28 wombat.wombatz.com systemd[1]: squid.service: Unit cannot be 
reloaded because it is inactive.
Feb 27 14:56:30 wombat.wombatz.com avahi-daemon[1321]: Joining mDNS multicast 
group on interface enp5s0.IPv6 with address fe80::226:18ff:fe3a:2a1b.
Feb 27 14:56:30 wombat.wombatz.com avahi-daemon[1321]: New relevant interface 
enp5s0.IPv6 for mDNS.
Feb 27 14:56:30 wombat.wombatz.com avahi-daemon[1321]: Registering new address 
record for fe80::226:18ff:fe3a:2a1b on enp5s0.*.
Feb 27 14:56:39 wombat.wombatz.com systemd[1]: 
NetworkManager-dispatcher.service: Succeeded.
Feb 27 14:56:39 wombat.wombatz.com audit[1]: SERVICE_STOP pid=1 uid=0 
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 
msg='unit=NetworkManager-dispatcher comm="systemd" 
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'



-- 
 Doug Herr
fedoraproject....@wombatz.com
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