apport information
** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/1832472/+attachment/5271312/+files/ProcEnviron.txt
** Description changed:
Upon plugging in a USB adapter for NBase-T ethernet with an Realtek chip
RTL8156 the kernel module cdc_ncm starts flooding /var/log/syslog with
unneccessary status info.
The status lines either say that there's no ethernet link or show the
interface as connected and state the link speed.
The relevant parts from /var/log/syslog after attaching the adapter
without ethernet link read like this:
[...]
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.398485] usb 2-3: new SuperSpeed Gen
1 USB device number 5 using xhci_hcd
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.419463] usb 2-3: New USB device
found, idVendor=0bda, idProduct=8156, bcdDevice=30.00
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.419469] usb 2-3: New USB device
strings: Mfr=1, Product=2, SerialNumber=6
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.419472] usb 2-3: Product: USB
10/100/1G/2.5G LAN
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.419475] usb 2-3: Manufacturer:
Realtek
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.419477] usb 2-3: SerialNumber:
1
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.447769] cdc_ncm 2-3:2.0:
MAC-Address: 00:13:3b:68:00:e9
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.447775] cdc_ncm 2-3:2.0: setting
rx_max = 16384
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.447929] cdc_ncm 2-3:2.0: setting
tx_max = 16384
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.448901] cdc_ncm 2-3:2.0 usb0:
register 'cdc_ncm' at usb-:00:14.0-3, CDC NCM, 00:13:3b:68:00:e9
Jun 12 10:48:58 resdz-v13 NetworkManager[916]: [1560329338.1872]
manager: (usb0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/8)
Jun 12 10:48:58 resdz-v13 mtp-probe: checking bus 2, device 5:
"/sys/devices/pci:00/:00:14.0/usb2/2-3"
Jun 12 10:48:58 resdz-v13 mtp-probe: bus: 2, device: 5 was not an MTP device
Jun 12 10:48:58 resdz-v13 systemd-udevd[4299]: Using default interface naming
scheme 'v240'.
Jun 12 10:48:58 resdz-v13 systemd-udevd[4299]: link_config: autonegotiation
is unset or enabled, the speed and duplex are not writable.
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.466476] cdc_ncm 2-3:2.0
enx00133b6800e9: renamed from usb0
Jun 12 10:48:58 resdz-v13 NetworkManager[916]: [1560329338.2315]
device (usb0): interface index 7 renamed iface from 'usb0' to 'enx00133b6800e9'
Jun 12 10:48:58 resdz-v13 systemd-udevd[4299]: Process
'vlan-network-interface UDEV' failed with exit code 1.
Jun 12 10:48:58 resdz-v13 NetworkManager[916]: [1560329338.2431]
device (enx00133b6800e9): state change: unmanaged -> unavailable (reason
'managed', sys-iface-state: 'external')
Jun 12 10:48:58 resdz-v13 charon: 12[KNL] interface enx00133b6800e9 activated
Jun 12 10:48:58 resdz-v13 mtp-probe: checking bus 2, device 5:
"/sys/devices/pci:00/:00:14.0/usb2/2-3"
Jun 12 10:48:58 resdz-v13 mtp-probe: bus: 2, device: 5 was not an MTP device
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.524052] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: disconnected
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.556109] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: disconnected
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.588054] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: disconnected
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.620383] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: disconnected
Jun 12 10:48:58 resdz-v13 kernel: [ 4240.652415] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: disconnected
[...]
Upon plugging in the ethernet cable I see
[...]
Jun 12 10:49:01 resdz-v13 kernel: [ 4243.372273] cdc_ncm 2-3:2.0
enx00133b6800e9: 1000 mbit/s downlink 1000 mbit/s uplink
Jun 12 10:49:01 resdz-v13 kernel: [ 4243.404278] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: connected
[...]
and Network Manager starts its work.
After the interface is up the flooding continues:
[...]
Jun 12 10:49:01 resdz-v13 kernel: [ 4243.564056] cdc_ncm 2-3:2.0
enx00133b6800e9: 1000 mbit/s downlink 1000 mbit/s uplink
Jun 12 10:49:01 resdz-v13 kernel: [ 4243.596051] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: connected
Jun 12 10:49:01 resdz-v13 whoopsie[1530]: [10:49:01] The default IPv4 route
is: /org/freedesktop/NetworkManager/ActiveConnection/4
Jun 12 10:49:01 resdz-v13 whoopsie[1530]: [10:49:01] Not a paid data plan:
/org/freedesktop/NetworkManager/ActiveConnection/4
Jun 12 10:49:01 resdz-v13 whoopsie[1530]: [10:49:01] Found usable connection:
/org/freedesktop/NetworkManager/ActiveConnection/4
Jun 12 10:49:01 resdz-v13 whoopsie[1530]: [10:49:01] online
Jun 12 10:49:01 resdz-v13 kernel: [ 4243.628055] cdc_ncm 2-3:2.0
enx00133b6800e9: 1000 mbit/s downlink 1000 mbit/s uplink
Jun 12 10:49:01 resdz-v13 kernel: [ 4243.660060] cdc_ncm 2-3:2.0
enx00133b6800e9: network connection: connected
