Hi,
we have the following situation, multiple devices throughout Europe using a Sierra Wireless MC7455 module with a SIM-Card for LTE connection, during the day while operating more or less every day the connection drops without us doing anything and stays disconnected between 1 minute and a few hours. The syslog if this happens looks like so:
Jun 10 11:36:40 nvidia-desktop ModemManager[5765]: <info> bearer call end reason (1): 'generic-unspecified'
Jun 10 11:36:40 nvidia-desktop ModemManager[5765]: <info> bearer verbose call end reason (3,1028): [cm] (null)
Jun 10 11:36:40 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connected -> registered)
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.8865] modem["cdc-wdm0"]: modem state changed, 'connected' --> 'registered' (reason: user-requested)
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.8867] device (cdc-wdm0): state change: activated -> failed (reason 'modem-no-carrier', sys-iface-state: 'managed')
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <warn> [1654853800.8995] device (cdc-wdm0): Activation: failed for connection 'A1/Telekom Austria A1 Breitband 1'
Jun 10 11:36:40 nvidia-desktop dbus-daemon[5577]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.8' (uid=0 pid=5892 comm="/usr/sbin/NetworkManager --no-daemon ")
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.9085] device (cdc-wdm0): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
Jun 10 11:36:40 nvidia-desktop systemd[1]: Starting Network Manager Script Dispatcher Service...
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.9274] policy: auto-activating connection 'A1/Telekom Austria A1 Breitband 1'
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.9366] device (cdc-wdm0): Activation: starting connection 'A1/Telekom Austria A1 Breitband 1' (c5e2a095-25e4-4755-823d-f517765b6647)
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.9387] device (cdc-wdm0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Jun 10 11:36:40 nvidia-desktop NetworkManager[5892]: <info> [1654853800.9415] device (cdc-wdm0): state change: prepare -> need-auth (reason 'none', sys-iface-state: 'managed')
Jun 10 11:36:40 nvidia-desktop systemd[1]: Starting resolvconf-pull-resolved.service...
Jun 10 11:36:41 nvidia-desktop dbus-daemon[5577]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun 10 11:36:41 nvidia-desktop systemd[1]: Started Network Manager Script Dispatcher Service.
Jun 10 11:36:41 nvidia-desktop nm-dispatcher: req:1 'down' [wwan0]: new request (2 scripts)
Jun 10 11:36:41 nvidia-desktop nm-dispatcher: req:1 'down' [wwan0]: start running ordered scripts...
Jun 10 11:36:41 nvidia-desktop nm-dispatcher: req:2 'connectivity-change': new request (2 scripts)
Jun 10 11:36:41 nvidia-desktop systemd[1]: Started resolvconf-pull-resolved.service.
Jun 10 11:36:41 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:36:41 nvidia-desktop NetworkManager[5892]: <info> [1654853801.1011] device (cdc-wdm0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Jun 10 11:36:41 nvidia-desktop nm-dispatcher: req:2 'connectivity-change': start running ordered scripts...
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect started...
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (4/8): Wait to get fully enabled
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (5/8): Register
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (6/8): Bearer
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (7/8): Connect
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting)
Jun 10 11:36:41 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:36:41 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:36:41 nvidia-desktop NetworkManager[5892]: <info> [1654853801.1299] modem["cdc-wdm0"]: modem state changed, 'registered' --> 'connecting' (reason: user-requested)
Jun 10 11:36:41 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> error: couldn't start network: QMI protocol error (14): 'CallFailed'
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> call end reason (3): 'generic-no-service'
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> verbose call end reason (3,2001): [cm] no-service
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> error: couldn't start network: QMI protocol error (14): 'CallFailed'
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> call end reason (3): 'generic-no-service'
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> verbose call end reason (3,2001): [cm] no-service
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> registered)
Jun 10 11:36:41 nvidia-desktop NetworkManager[5892]: <info> [1654853801.7350] modem["cdc-wdm0"]: modem state changed, 'connecting' --> 'registered' (reason: user-requested)
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect started...
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (4/8): Wait to get fully enabled
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (5/8): Register
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (6/8): Bearer
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Simple connect state (7/8): Connect
Jun 10 11:36:41 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting)
Jun 10 11:36:41 nvidia-desktop NetworkManager[5892]: <info> [1654853801.7513] modem["cdc-wdm0"]: modem state changed, 'registered' --> 'connecting' (reason: user-requested)
Jun 10 11:37:01 nvidia-desktop sdxf_manager_launcher[11509]: INFO: 192.168.0.2:60805 - "GET /system/status HTTP/1.1" 200 OK
Jun 10 11:37:23 nvidia-desktop sdxf_manager_launcher[11509]: INFO: 192.168.0.2:60807 - "GET /system/status HTTP/1.1" 200 OK
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> registered)
Jun 10 11:37:27 nvidia-desktop NetworkManager[5892]: <info> [1654853847.4353] modem["cdc-wdm0"]: modem state changed, 'connecting' --> 'registered' (reason: user-requested)
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Simple connect started...
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Simple connect state (4/8): Wait to get fully enabled
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Simple connect state (5/8): Register
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Simple connect state (6/8): Bearer
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Simple connect state (7/8): Connect
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting)
Jun 10 11:37:27 nvidia-desktop NetworkManager[5892]: <info> [1654853847.4521] modem["cdc-wdm0"]: modem state changed, 'registered' --> 'connecting' (reason: user-requested)
Jun 10 11:37:27 nvidia-desktop ModemManager[5765]: [/dev/cdc-wdm0] No transaction matched in received message
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> error: couldn't start network: QMI protocol error (14): 'CallFailed'
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> call end reason (3): 'generic-no-service'
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> verbose call end reason (6,50): [3gpp] ipv4-only-allowed
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> registered)
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.5833] modem["cdc-wdm0"]: modem state changed, 'connecting' --> 'registered' (reason: user-requested)
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <warn> [1654853852.5836] modem-broadband[cdc-wdm0]: failed to connect modem: QMI protocol error (14): 'CallFailed'
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.5837] device (cdc-wdm0): state change: prepare -> failed (reason 'unknown', sys-iface-state: 'managed')
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <warn> [1654853852.5868] device (cdc-wdm0): Activation: failed for connection 'A1/Telekom Austria A1 Breitband 1'
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.5903] device (cdc-wdm0): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.5945] policy: auto-activating connection 'A1/Telekom Austria A1 Breitband 1'
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.5988] device (cdc-wdm0): Activation: starting connection 'A1/Telekom Austria A1 Breitband 1' (c5e2a095-25e4-4755-823d-f517765b6647)
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.6007] device (cdc-wdm0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.6029] device (cdc-wdm0): state change: prepare -> need-auth (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.7103] device (cdc-wdm0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Simple connect started...
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Simple connect state (4/8): Wait to get fully enabled
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Simple connect state (5/8): Register
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Simple connect state (6/8): Bearer
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Simple connect state (7/8): Connect
Jun 10 11:37:32 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting)
Jun 10 11:37:32 nvidia-desktop NetworkManager[5892]: <info> [1654853852.7301] modem["cdc-wdm0"]: modem state changed, 'registered' --> 'connecting' (reason: user-requested)
Jun 10 11:37:32 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> QMI IPv4 Settings:
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> Address: 46.207.74.150/30
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> Gateway: 46.207.74.149
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> DNS #1: 10.122.6.68
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> DNS #2: 195.3.96.70
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> MTU: 1500
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> error: couldn't start network: QMI protocol error (14): 'CallFailed'
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> call end reason (1): 'generic-unspecified'
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> verbose call end reason (2,210): [internal] pdn-ipv6-call-disallowed
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> connected)
Jun 10 11:37:33 nvidia-desktop ModemManager[5765]: <info> Simple connect state (8/8): All done
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7354] modem["cdc-wdm0"]: modem state changed, 'connecting' --> 'connected' (reason: user-requested)
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7430] device (cdc-wdm0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7455] device (cdc-wdm0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7466] modem["cdc-wdm0"]: IPv6 configuration disabled
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7492] modem-broadband[cdc-wdm0]: IPv4 static configuration:
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7494] modem-broadband[cdc-wdm0]: address 46.207.74.150/30
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7496] modem-broadband[cdc-wdm0]: gateway 46.207.74.149
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7496] modem-broadband[cdc-wdm0]: DNS 10.122.6.68
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7496] modem-broadband[cdc-wdm0]: DNS 195.3.96.70
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7575] device (cdc-wdm0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:33 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:33 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7604] device (cdc-wdm0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7613] device (cdc-wdm0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7701] policy: set 'A1/Telekom Austria A1 Breitband 1' (wwan0) as default for IPv4 routing and DNS
Jun 10 11:37:33 nvidia-desktop NetworkManager[5892]: <info> [1654853853.7723] device (cdc-wdm0): Activation: successful, device activated.
Jun 10 11:37:33 nvidia-desktop dbus-daemon[5577]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.8' (uid=0 pid=5892 comm="/usr/sbin/NetworkManager --no-daemon ")
Jun 10 11:37:33 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:37:33 nvidia-desktop systemd[1]: Starting resolvconf-pull-resolved.service...
Jun 10 11:37:33 nvidia-desktop systemd[1]: Starting Network Manager Script Dispatcher Service...
Jun 10 11:37:33 nvidia-desktop systemd[1]: Started resolvconf-pull-resolved.service.
Jun 10 11:37:33 nvidia-desktop dbus-daemon[5577]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun 10 11:37:33 nvidia-desktop systemd[1]: Started Network Manager Script Dispatcher Service.
Jun 10 11:37:33 nvidia-desktop nm-dispatcher: req:1 'up' [wwan0]: new request (2 scripts)
Jun 10 11:37:33 nvidia-desktop nm-dispatcher: req:1 'up' [wwan0]: start running ordered scripts...
Jun 10 11:37:33 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:33 nvidia-desktop nm-applet[9245]: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Jun 10 11:37:33 nvidia-desktop nm-applet[9245]: Can't set a parent on widget which has a parent
Jun 10 11:37:34 nvidia-desktop systemd[1]: Reloading OpenBSD Secure Shell server.
Jun 10 11:37:34 nvidia-desktop systemd[1]: Reloaded OpenBSD Secure Shell server.
Jun 10 11:37:35 nvidia-desktop nm-dispatcher: req:2 'connectivity-change': new request (2 scripts)
Jun 10 11:37:35 nvidia-desktop nm-dispatcher: req:2 'connectivity-change': start running ordered scripts...
Can anyone tell me what exactly is happening, what does the syslog mean, can we do anything to improve this issue or what are the possible problems. If any additional information is required I can provide it, it is just that we have had this problem for quiet a while and where unable to find anyone who has at least a clue. Not the manufacturer of our devices nor the ISPs.
Thank you a lot!
Output fo mmcli -m 0:
--------------------------------
General | dbus path: /org/freedesktop/ModemManager1/Modem/0
| device id: bec7b157b140b1e978a28896924fea2c4ca88b24
--------------------------------
Hardware | manufacturer: Sierra Wireless, Incorporated
| model: MC7455
| revision: SWI9X30C_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 20:59:30
| h/w revision: 1.0
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 354572510482375
--------------------------------
System | device: /sys/devices/3610000.xhci/usb1/1-2
| drivers: qcserial, qmi_wwan
| plugin: Sierra
| primary port: cdc-wdm0
| ports: ttyUSB0 (qcdm), ttyUSB2 (at), cdc-wdm0 (qmi),
| cdc-wdm1 (qmi), wwan0 (net), wwan1 (net)
--------------------------------
Status | lock: sim-pin2
| unlock retries: sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2 (10)
| state: connected
| power state: on
| access tech: lte
| signal quality: 100% (recent)
--------------------------------
Modes | supported: allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 3g, 4g; preferred: 3g
| allowed: 3g, 4g; preferred: 4g
| current: allowed: 3g, 4g; preferred: 4g
--------------------------------
Bands | supported: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2,
| eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7, eutran-8,
| eutran-12, eutran-13, eutran-20, eutran-25, eutran-41
| current: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2,
| eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7, eutran-8,
| eutran-12, eutran-13, eutran-20, eutran-25, eutran-41
--------------------------------
IP | supported: ipv4, ipv6, ipv4v6
--------------------------------
3GPP | imei: 354572510482375
| operator id: 23201
| operator name: A1
| registration: home
--------------------------------
3GPP EPS | ue mode of operation: csps-2
--------------------------------
SIM | dbus path: /org/freedesktop/ModemManager1/SIM/0
--------------------------------
Bearer | dbus path: /org/freedesktop/ModemManager1/Bearer/236
| /org/freedesktop/ModemManager1/Bearer/0