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by

Hi,

After firmware upgrade to the latest firmware RUTX_R_00.07.02.7 version, the internal modem disconnects multiple times a day.

Firmware version RUTX_R_00.07.02.7

Firmware build date 2022-09-08 09:47:46

Internal modem firmware version EG12EAPAR01A09M4G

Kernel version 5.4.147


Below is a snippet from dmesg when this happens:

[422506.592997] usb 1-1: USB disconnect, device number 5

[422506.593557] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0

[422506.597250] option 1-1:1.0: device disconnected

[422506.606045] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1

[422506.610020] option 1-1:1.1: device disconnected

[422506.618780] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2

[422506.622643] option 1-1:1.2: device disconnected

[422506.631131] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3

[422506.635368] option 1-1:1.3: device disconnected

[422506.643658] qmi_wwan 1-1:1.4 wwan0: unregister 'qmi_wwan' usb-xhci-hcd.0.auto-1, WWAN/QMI device

[422514.120711] usb 1-1: new high-speed USB device number 6 using xhci-hcd

[422514.442322] option 1-1:1.0: GSM modem (1-port) converter detected

[422514.442716] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0

[422514.448138] option 1-1:1.1: GSM modem (1-port) converter detected

[422514.454885] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1

[422514.461655] option 1-1:1.2: GSM modem (1-port) converter detected

[422514.467734] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2

[422514.474469] option 1-1:1.3: GSM modem (1-port) converter detected

[422514.480952] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB3

[422514.506036] qmi_wwan 1-1:1.4: cdc-wdm0: USB WDM device

[422514.507485] qmi_wwan 1-1:1.4 wwan0: register 'qmi_wwan' at usb-xhci-hcd.0.auto-1, WWAN/QMI device, 82:94:84:97:63:53

[422533.919171] qmi_wwan 1-1:1.4 wwan0: mode: raw IP

And from webui log:
 

2022-10-05 12:14:43  Network Operator  Connected to DNA operator (internal modem) 
2022-10-05 12:14:43  Network Type  Joined FDD LTE network (internal modem) 
2022-10-05 12:14:43  Mobile Data  Mobile data connected (internal modem) 
2022-10-05 12:14:28  Mobile Data  Mobile data disconnected (internal modem) 
2022-10-05 12:13:22  Mobile Data  Mobile data disconnected (internal modem) 
2022-10-05 12:13:16  Mobile Data  Mobile data disconnected (internal modem)

I have rebooted the device multiple times, does not fix the issue. This happens multiple times a day.

by

I also have the same issues. Here is the event log:

2022-12-21 10:53:46      Mobile Data       Mobile data disconnected (internal modem)

2022-12-21 10:53:00      Mobile Data       Mobile data disconnected (internal modem)

2022-12-21 10:48:24      Mobile Data       Mobile data disconnected (internal modem)

2022-12-21 10:48:14      Mobile Data       Mobile data disconnected (internal modem)

My settings:

Device name: RUTX14

Product code: RUTX1400XXXX

Serial number: 1117759414

Hardware revision: 0201

Batch number: 0003

Firmware version: RUTX_R_00.07.02.8

Kernel version: 5.4.147

Modem Model: EG12

Modem FW version: EG12EAPAR01A09M4G

SIM card slot in use: SIM 1

SIM card state: inserted

Operator: o2 - de

Operator state: registered (home)

Connection type: 4G (FDD LTE); VoLTE

Signal strength: -59

Carrier Aggregation: Single

Connected band: LTE BAND 20

RSRP: -85

RSRQ: -8.0

SINR: 12.3

Question:

Does anyone knows a workaround? Rebooting the modem doesn't help but rebooting the device does sometimes.

Answer: I updated the Modem FW version from EG12EAPAR01A09M4G to EG12EAPAR01A12M4G and it worked.

by

Hello,

I would like you to send me a troubleshoot file in a private file. Please, replicate the issue, then access router's WebUI, go to System -> Administration -> Troubleshoot section and download troubleshoot file from there. The logs in the file may provide more details into possible causes of the issue.

However, the suggestion might follow to perform modem update as instructed below.

Best regards,

1 Answer

+1 vote
by

Hello,

I would like you to try to update modem firmware. You can find the procedure described here.

In your case:

  • <ID> - should be 1-1, however, in case of an error you should be shown a correct ID.

  • <VERSION> - enter the latest firmware version from the list of the previously executed command, it should be EG12EAPAR01A12M4G.

If alternative WAN source is not available, use the following instructions:

  • Download the firmware zip from this link.
  • Extract the contents of the zip to a separate folder, for example, Update. Delete PDF with Chinese symbols as it might cause issues.
  • Copy the Update folder to a USB drive or, if you have available space, using WinSCP, copy it to the router's /tmp directory.
  • As instructed previously, download modem_updater and sshfs.
  • If the folder is stored in USB, attach the USB drive to the router, and execute the following command:
    • modem_updater -i 1-1 -p /mnt/sda1/Update/
  • If the folder is placed in /tmp directory, the command should look like this:
    •  modem_updater -i 1-1 -p /tmp/Update/ 
  • The rest of the update should happen automatically.

Best regards,

by

Thanks, will try this. In which package the modem_updater bin is? The RUTX14 does not have it installed by default.

Sorry, was blind.

Access your device via SSH and execute the following commands:

  • opkg update
  • opkg install modem_updater
  • opkg install sshfs
  • modem_updater -g

So finally managed to upgrade the firmware. The update package was too large for the flash, so had to use sshfs to present the image to RUTX14 and after that the upgrade was successful. Now running:

Firmware version RUTX_R_00.07.02.7

by
Sent it in a private message.
by

After update to Internal modem firmware from EG12EAPAR01A09M4G to EG12EAPAR01A12M4G the issue has been fixed. No more random disconnects. Thanks!

by
That is good to hear!