simple connect register throws warnings and takes long

Fri Aug 16 12:02:31 UTC 2024

Hi,

I use a "Quectel Wireless Solutions Co., Ltd. RM520N-GL" to connect to cellular neworks (in this example 1nce)

After setting the initialbearer

mmcli -m any --3gpp-set-initial-eps-bearer-settings="apn=iot.1nce.net,ip-type=ipv4v6"

Modifying the nmcli connection

nmcli c mod wwan gsm.apn iot.1nce.net autoconnect yes

and trying to bring up the connection.

nmcli c up wwan

The modem takes a really long time to connect to the network. It seems that the nmcli does wait for the modem state to be connected.

I did grep the journal of mmcli to check what is taking that long and I got some warnings in simple connect state (6/10): register.

Aug 16 08:26:09 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (roaming -> registering)
Aug 16 08:26:09 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (registering -> roaming)
Aug 16 08:26:10 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (roaming -> unknown)
Aug 16 08:26:10 ModemManager[456]: <info>  [modem0] state changed (registered -> enabled)
Aug 16 08:26:19 ModemManager[456]: <info>  [modem0] simple connect started...
Aug 16 08:26:19 ModemManager[456]: <info>  [modem0] simple connect state (6/10): register
Aug 16 08:26:26 ModemManager[456]: <warn>  [modem0] couldn't reload extended signal information: No way to load extended signal information
Aug 16 08:26:36 ModemManager[456]: <warn>  [modem0] couldn't reload extended signal information: No way to load extended signal information
Aug 16 08:26:47 ModemManager[456]: <warn>  [modem0] couldn't reload extended signal information: No way to load extended signal information
Aug 16 08:26:56 ModemManager[456]: <warn>  [modem0] couldn't reload extended signal information: No way to load extended signal information
Aug 16 08:27:06 ModemManager[456]: <warn>  [modem0] couldn't reload extended signal information: No way to load extended signal information
Aug 16 08:27:17 ModemManager[456]: <warn>  [modem0] couldn't reload extended signal information: No way to load extended signal information
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0] network reject indication received
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0]   service domain: ps
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0]   radio interface: 5gnr
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0]   reject cause: (null)
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0]   mcc: 262
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0]   mnc: 1
Aug 16 08:27:19 ModemManager[456]: <warn>  [modem0]   closed subscriber group: 27
Aug 16 08:27:19 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (unknown -> idle)
Aug 16 08:27:19 ModemManager[456]: <info>  [modem0] simple connect started...
Aug 16 08:27:19 ModemManager[456]: <info>  [modem0] simple connect state (6/10): register
Aug 16 08:27:20 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (idle -> unknown)
Aug 16 08:27:21 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (unknown -> registering)
Aug 16 08:27:21 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (registering -> roaming)
Aug 16 08:27:21 ModemManager[456]: <info>  [modem0] state changed (enabled -> registered)
Aug 16 08:27:22 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (roaming -> registering)
Aug 16 08:27:22 ModemManager[456]: <info>  [modem0] 3GPP registration state changed (registering -> roaming)
Aug 16 08:27:22 ModemManager[456]: <info>  [modem0] simple connect state (7/10): wait to get packet service state attached
Aug 16 08:27:22 ModemManager[456]: <info>  [modem0] simple connect state (8/10): bearer
Aug 16 08:27:22 ModemManager[456]: <info>  [modem0] simple connect state (9/10): connect
Aug 16 08:27:22 ModemManager[456]: <info>  [modem0] state changed (registered -> connecting)
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3] QMI IPv4 Settings:
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3]     address: 100.76.105.26/30
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3]     gateway: 100.76.105.25
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3]     DNS #1: 8.8.8.8
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3]     DNS #2: 8.8.4.4
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3]        MTU: 1500
Aug 16 08:27:23 ModemManager[456]: <error> mm_utils_bin2hexstr: assertion 'bin != NULL' failed
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0/bearer3] reloading stats is supported by the device
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0] state changed (connecting -> connected)
Aug 16 08:27:23 ModemManager[456]: <info>  [modem0] simple connect state (10/10): all done

It seems like the connection process takes a long time during the errors "couldn't reload extended signal information: No way to load extended signal information".

Any idea or recommendation, how I can fix it?

Best regards,

Dominik

Dominik Nille
Technology
Innovation Management

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