Strange behavior with ping and ssh : works only from time to time.
for ping, we are able to reproduce (100%) as follow
starting with sierra wireless not connect from the VM USB perihperals
from the VM : ping 192.168.2.2 : no response
connect the sirra wireless
-disconnect it : the ping is now responding but stop after 17 requests . have to connect and disconnect the sierra from ths usb peripherals
kill the ping, issue the command again
ssh of course works only during the time qhere the ping is responding …
Host : kubuntu 18.04
lsusb : Bus 003 Device 067: ID 1199:68c0 Sierra Wireless, Inc.
Syslog (host )when ping is running then stop Dec 4 15:32:18 multimed nm-dispatcher: req:1 ‘up’ [enp0s20u12i19]: start running ordered scripts…
Dec 4 15:32:20 multimed ModemManager[778]: (ttyUSB0): port attributes not fully set
Dec 4 15:32:20 multimed ModemManager[778]: (ttyUSB1): port attributes not fully set
Dec 4 15:32:20 multimed ModemManager[778]: (ttyUSB2): port attributes not fully set
Dec 4 15:32:20 multimed ModemManager[778]: [/dev/cdc-wdm0] Opening device with flags ‘version-info, proxy’…
Dec 4 15:32:20 multimed ModemManager[778]: [/dev/cdc-wdm0] loaded driver of cdc-wdm port: qmi_wwan
Dec 4 15:32:20 multimed ModemManager[778]: cannot connect to proxy: Could not connect: Connection refused
Dec 4 15:32:20 multimed ModemManager[778]: spawning new qmi-proxy (try 1)…
Dec 4 15:32:20 multimed ModemManager[778]: [/dev/cdc-wdm0] Checking version info (10 retries)…
Dec 4 15:32:20 multimed avahi-daemon[775]: Joining mDNS multicast group on interface enp0s20u12i19.IPv6 with address fe80::6657:6d26:2c9d:8fb5.
Dec 4 15:32:20 multimed avahi-daemon[775]: New relevant interface enp0s20u12i19.IPv6 for mDNS.
Dec 4 15:32:20 multimed avahi-daemon[775]: Registering new address record for fe80::6657:6d26:2c9d:8fb5 on enp0s20u12i19.*.
Dec 4 15:32:29 multimed ModemManager[778]: (tty/ttyUSB0) failed to parse QCDM version info command result: -7
Dec 4 15:32:35 multimed ModemManager[778]: Creating modem with plugin ‘Sierra’ and ‘6’ ports
Dec 4 15:32:35 multimed ModemManager[778]: Could not grab port (tty/ttyUSB1): ‘Cannot add port ‘tty/ttyUSB1’, unhandled serial type’
Dec 4 15:32:35 multimed ModemManager[778]: Could not grab port (usbmisc/cdc-wdm0): ‘Cannot add port ‘usbmisc/cdc-wdm0’, unsupported’
Dec 4 15:32:35 multimed ModemManager[778]: (ttyUSB2): port attributes not fully set
Dec 4 15:32:35 multimed ModemManager[778]: Modem for device at ‘/sys/devices/pci0000:00/0000:00:14.0/usb3/3-12’ successfully created
Dec 4 15:32:36 multimed ModemManager[778]: Modem: state changed (unknown -> disabled)
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.0865] device (enp0s20u12i19): state change: activated -> deactivating (reason ‘connection-removed’, sys-iface-state: ‘managed’)
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.0990] modem[“ttyUSB2”]: modem state changed, ‘disabled’ --> ‘enabling’ (reason: user preference)
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.0994] manager: (ttyUSB2): new Broadband device (/org/freedesktop/NetworkManager/Devices/43)
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.0995] device (ttyUSB2): state change: unmanaged -> unavailable (reason ‘managed’, sys-iface-state: ‘external’)
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.0996] device (ttyUSB2): modem state ‘enabling’
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.1001] device (enp0s20u12i19): state change: deactivating -> disconnected (reason ‘connection-removed’, sys-iface-state: ‘managed’)
Dec 4 15:32:36 multimed avahi-daemon[775]: Withdrawing address record for fe80::6657:6d26:2c9d:8fb5 on enp0s20u12i19.
Dec 4 15:32:36 multimed avahi-daemon[775]: Leaving mDNS multicast group on interface enp0s20u12i19.IPv6 with address fe80::6657:6d26:2c9d:8fb5.
Dec 4 15:32:36 multimed avahi-daemon[775]: Interface enp0s20u12i19.IPv6 no longer relevant for mDNS.
Dec 4 15:32:36 multimed ModemManager[778]: Modem /org/freedesktop/ModemManager1/Modem/18: state changed (disabled -> enabling)
Dec 4 15:32:36 multimed ModemManager[778]: (ttyUSB2): port attributes not fully set
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.1192] dhcp4 (enp0s20u12i19): canceled DHCP transaction, DHCP client pid 6567
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.1192] dhcp4 (enp0s20u12i19): state changed bound -> done
Dec 4 15:32:36 multimed avahi-daemon[775]: Withdrawing address record for 192.168.2.3 on enp0s20u12i19.
Dec 4 15:32:36 multimed avahi-daemon[775]: Leaving mDNS multicast group on interface enp0s20u12i19.IPv4 with address 192.168.2.3.
Dec 4 15:32:36 multimed NetworkManager[819]: ((src/nm-dispatcher.c:545)): assertion ‘’ failed
Dec 4 15:32:36 multimed avahi-daemon[775]: Interface enp0s20u12i19.IPv4 no longer relevant for mDNS.
Dec 4 15:32:36 multimed NetworkManager[819]: g_object_notify_by_pspec: assertion ‘G_IS_OBJECT (object)’ failed
Dec 4 15:32:36 multimed NetworkManager[819]: message repeated 4 times: [ g_object_notify_by_pspec: assertion ‘G_IS_OBJECT (object)’ failed]
Dec 4 15:32:36 multimed NetworkManager[819]: ((src/devices/nm-device.c:1073)): assertion ‘’ failed
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.1198] device [null]: remove_pending_action (1): ‘queued-state-change-disconnected’ not pending
Dec 4 15:32:36 multimed NetworkManager[819]: file src/devices/nm-device.c: line 12495 (): should not be reached
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.1199] device (ttyUSB2): state change: unavailable -> disconnected (reason ‘none’, sys-iface-state: ‘managed’)
Dec 4 15:32:36 multimed ModemManager[778]: Modem /org/freedesktop/ModemManager1/Modem/18: 3GPP Registration state changed (unknown -> searching)
Dec 4 15:32:36 multimed ModemManager[778]: Modem /org/freedesktop/ModemManager1/Modem/18: state changed (enabling -> searching)
Dec 4 15:32:36 multimed NetworkManager[819]: [1543933956.5898] modem[“ttyUSB2”]: modem state changed, ‘enabling’ --> ‘searching’ (reason: user-requested)
is not an issue with the VM, but with the unix host … have the same behavior when using ping or ssh from the Unix host. Any firmware update to apply on the board, or specific requirements on the linux hosts (kubuntu 18.04) ?
(@see syslog extract atatched with modemmanager in debug mode trace)
Dec 4 15:32:18 multimed nm-dispatcher: req:1 ‘up’ [enp0s20u12i19]: start running ordered scripts…