GL-E750V2 Mudi V2 internal modem keeps unplugging itself

samvde · September 12, 2024, 12:29pm

I unfortunately have the exact same issue, and I wonder whether I should return the device or do a software fix ?

I have nothing connected to USB and use the official charger. Wifi 2Ghz is on but that really shouldn' t be an influence as mentioned above.

ywp · September 13, 2024, 1:59am

I've sent this question to quectel
But they were slow to deal with it
Please wait a few days
I will update this post if there is any progress
I'm sorry for the inconvenience

Stephan · October 27, 2024, 8:43am

Dear all,
any news on this problem as I have the same trouble.

majiang · October 27, 2024, 2:59pm

Hi all,
today I encountered the same problem. 4G modem disappeared and no Internet any more.
After restart it works for a short time.

Is there a fix for this problem already?
Thanks!

Javon_ma · October 30, 2024, 12:43am

Also E750V2 EM06K? We are analyzing the cause, please be patient.

majiang · November 2, 2024, 6:39am

It's the EM060KGL

eirenik0 · November 6, 2024, 8:41am

I have the same issue with this modem, as far as I understand.

Also, while upgrading the firmware to an EM060KGLAAR01A12M2GA, it got stuck on send ../sbl1.mbn and broke the modem. So, be careful with upgrading...

Davidliu · November 6, 2024, 9:43am

Hi eirenik, can you export the logs and send them to me to check?

eirenik0 · November 6, 2024, 11:32am

Hey dawei.liu!

I've sent them already over email to support@gl-inet.com, but here is:

"""
I've tried to upgrade to new version of firmware EM060KGLAAR01A12M2GA but it stuck on [076.311]: send ../sbl1.mbn, filesize=246440

I've been waiting of hour for finishing but without success, so I interrupt it. How to make modem work again?

Add the logs that I have for now GL-E750v2 - Pastebin.com

I was managed to start flashing again with flag -e but it still stuck on the same ../sbl1.mbn place
"""

Javon_ma · November 7, 2024, 8:09am

Sorry to keep you waiting.
Please leave your email address and I will send you a new upgrade tool. Please power off the device before trying to upgrade. If you have any questions, please contact me in time.
Thanks!

Javon_ma · November 7, 2024, 8:19am

Please download the upgrade tool from this link：Unique Download Link | WeTransfer

FS88 · November 14, 2024, 9:58am

Hello, is there any solution? I bought 5 of these routers and have same exact problem with dropping cellular modem and „no internet” on the screen

bruce · November 27, 2024, 2:41am

Hi, does the syslog is similar to this post?
If yes, please email contact support@gl-inet.com, my colleagues will help you to solve it, thank you.

mwm · December 15, 2024, 9:30am

Hi, I have similar problem with my MudiV2. Sometimes randomly lost connection to modem, is unpluged. Upgrade tool from link above helped at your case? Can I ask to reupload it again?

mandre96 · February 10, 2025, 10:15am

Hello @bruce @Javon_ma @Davidliu @ywp

I got a replacement GL-E750V2 from you but am still having problems after all these months.

(1) The original problem I mentioned at the beginning of this thread still happens.

(2) Also, even when the modem does not unplug itself, I often randomly lose my Internet connection. I have to click on the "Hard reboot" button on the admin page to reboot the modem to regain my Internet connection.

Here's an example log of my GL-E750V2 losing Internet and me hard rebooting the modem from today:

Mon Feb 10 09:54:45 2025 daemon.notice netifd: modem_1_1_2_4 (24029): udhcpc: sending renew to server 10.219.31.9
Mon Feb 10 09:55:15 2025 user.notice root: modem ip different, now regain ip ...
Mon Feb 10 09:55:15 2025 user.notice mwan3[964]: Execute ifdown event on interface modem_1_1_2 (wwan0)
Mon Feb 10 09:55:15 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' has lost the connection
Mon Feb 10 09:55:16 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is now down
Mon Feb 10 09:55:16 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is disabled
Mon Feb 10 09:55:16 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is enabled
Mon Feb 10 09:55:16 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is setting up now
Mon Feb 10 09:55:16 2025 daemon.notice netifd: modem_1_1_2_4 (1125): udhcpc: started, v1.35.0
Mon Feb 10 09:55:16 2025 daemon.notice netifd: modem_1_1_2_4 (1125): udhcpc: broadcasting discover
Mon Feb 10 09:55:19 2025 daemon.notice netifd: modem_1_1_2_4 (1125): udhcpc: broadcasting discover
Mon Feb 10 09:55:22 2025 user.notice mwan3[1073]: Execute ifdown event on interface modem_1_1_2_4 (unknown)
Mon Feb 10 09:55:22 2025 daemon.notice netifd: modem_1_1_2_4 (1125): udhcpc: broadcasting discover
Mon Feb 10 09:55:26 2025 user.notice firewall: Reloading firewall due to ifdown of modem_1_1_2 (wwan0)
Mon Feb 10 09:55:27 2025 user.notice firewall: Reloading firewall due to ifdown of modem_1_1_2_4 ()
Mon Feb 10 09:55:32 2025 user.info mwan3track[24572]: Detect ifdown event on interface modem_1_1_2 (wwan0)
Mon Feb 10 09:55:37 2025 user.notice mwan3track[24572]: Interface modem_1_1_2 (wwan0) is offline
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.749379] usb 1-1.2: USB disconnect, device number 9
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.749776] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.749934] option 1-1.2:1.0: device disconnected
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.750576] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.750715] option 1-1.2:1.1: device disconnected
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.757776] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.757908] option 1-1.2:1.2: device disconnected
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.758501] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.758653] option 1-1.2:1.3: device disconnected
Mon Feb 10 09:56:27 2025 kern.info kernel: [516019.759179] qmi_wwan 1-1.2:1.4 wwan0: unregister 'qmi_wwan' usb-1b000000.usb-1.2, WWAN/QMI device
Mon Feb 10 09:56:27 2025 daemon.notice netifd: Network device 'wwan0' link is down
Mon Feb 10 09:56:27 2025 daemon.notice netifd: Network alias 'wwan0' link is down
Mon Feb 10 09:56:27 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' has link connectivity loss
Mon Feb 10 09:56:27 2025 daemon.notice netifd: modem_1_1_2_4 (1125): udhcpc: read error: Network is down, reopening socket
Mon Feb 10 09:56:28 2025 daemon.notice netifd: modem_1_1_2_4 (1125): udhcpc: bind: No such device
Mon Feb 10 09:56:28 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is now down
Mon Feb 10 09:56:28 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is disabled
Mon Feb 10 09:56:28 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:29 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:30 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:31 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:31 2025 user.notice mwan3[3364]: Execute ifdown event on interface modem_1_1_2_4 (unknown)
Mon Feb 10 09:56:32 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:33 2025 daemon.info procd: Instance smstools3::instance1 pid 25853 not stopped on SIGTERM, sending SIGKILL instead
Mon Feb 10 09:56:33 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:34 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:35 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:36 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:37 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:38 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:39 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:40 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:41 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:42 2025 user.notice firewall: Reloading firewall due to ifdown of modem_1_1_2_4 ()
Mon Feb 10 09:56:42 2025 daemon.err modem_AT: (modem_AT.c:388) The /dev/ttyUSB2 does not open,continue to try.
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.409476] usb 1-1.2: new high-speed USB device number 10 using ehci-platform
Mon Feb 10 09:56:43 2025 kern.warn kernel: [516035.560334] usb 1-1.2: config 1 has an invalid interface number: 12 but max is 5
Mon Feb 10 09:56:43 2025 kern.warn kernel: [516035.560357] usb 1-1.2: config 1 has no interface number 5
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.573374] option 1-1.2:1.0: GSM modem (1-port) converter detected
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.573673] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.574294] option 1-1.2:1.1: GSM modem (1-port) converter detected
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.574571] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.575232] option 1-1.2:1.2: GSM modem (1-port) converter detected
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.575508] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB2
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.576197] option 1-1.2:1.3: GSM modem (1-port) converter detected
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.576577] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB3
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.611890] qmi_wwan 1-1.2:1.4: cdc-wdm0: USB WDM device
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.629348] qmi_wwan 1-1.2:1.4: QuectelEC25&EC21&EG91&EG95&EG06&EP06&EM06&BG96&AG35 qmi wwan detected
Mon Feb 10 09:56:43 2025 kern.info kernel: [516035.630432] qmi_wwan 1-1.2:1.4 wwan0: register 'qmi_wwan' at usb-1b000000.usb-1.2, WWAN/QMI device, 0e:4d:98:9a:94:97
Mon Feb 10 09:56:53 2025 daemon.notice netifd: modem_1_1_2 (5006): Stopping network modem_1_1_2
Mon Feb 10 09:56:53 2025 daemon.notice netifd: modem_1_1_2 (5006): Command failed: ubus call network.interface notify_proto { "action": 0, "link-up": false, "keep": false, "interface": "modem_1_1_2" } (Permission denied)
Mon Feb 10 09:56:53 2025 daemon.notice netifd: Interface 'modem_1_1_2' is now down
Mon Feb 10 09:56:57 2025 user.notice mwan3[5005]: Execute ifdown event on interface modem_1_1_2 (unknown)
Mon Feb 10 09:56:57 2025 user.info mwan3track[24572]: Detect ifdown event on interface modem_1_1_2 (wwan0)
Mon Feb 10 09:56:57 2025 user.notice mwan3track[24572]: Interface modem_1_1_2 (wwan0) is offline
Mon Feb 10 09:57:10 2025 user.notice firewall: Reloading firewall due to ifdown of modem_1_1_2 ()
Mon Feb 10 09:57:37 2025 daemon.notice netifd: Interface 'modem_1_1_2' is setting up now
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984): OK
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984): ERROR
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:39 2025 daemon.notice netifd: modem_1_1_2 (7984): ERROR
Mon Feb 10 09:57:40 2025 daemon.notice netifd: modem_1_1_2 (7984): Failed to parse message data
Mon Feb 10 09:57:40 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:40 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:40 2025 daemon.notice netifd: modem_1_1_2 (7984): OK
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984): OK
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984):
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984): ERROR
Mon Feb 10 09:57:41 2025 daemon.notice netifd: modem_1_1_2 (7984): cat: can't open '/proc/gl-hw-info/sim': No such file or directory
Mon Feb 10 09:57:42 2025 daemon.notice netifd: modem_1_1_2 (7984): Waiting for SIM initialization
Mon Feb 10 09:57:45 2025 daemon.notice netifd: modem_1_1_2 (7984): Request timed out
Mon Feb 10 09:57:46 2025 daemon.notice netifd: modem_1_1_2 (7984): Starting network modem_1_1_2
Mon Feb 10 09:57:46 2025 daemon.notice netifd: modem_1_1_2 (7984): sh: PAP/CHAP: unknown operand
Mon Feb 10 09:57:47 2025 daemon.notice netifd: modem_1_1_2 (7984): Setting up wwan0
Mon Feb 10 09:57:47 2025 daemon.notice netifd: Interface 'modem_1_1_2' is now up
Mon Feb 10 09:57:47 2025 daemon.notice netifd: Network device 'wwan0' link is up
Mon Feb 10 09:57:47 2025 daemon.notice netifd: Network alias 'wwan0' link is up
Mon Feb 10 09:57:48 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is enabled
Mon Feb 10 09:57:48 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' has link connectivity
Mon Feb 10 09:57:48 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is setting up now
Mon Feb 10 09:57:49 2025 daemon.notice netifd: modem_1_1_2_4 (8673): udhcpc: started, v1.35.0
Mon Feb 10 09:57:49 2025 daemon.notice netifd: modem_1_1_2_4 (8673): udhcpc: broadcasting discover
Mon Feb 10 09:57:49 2025 daemon.notice netifd: modem_1_1_2_4 (8673): udhcpc: broadcasting select for 10.12.129.62, server 10.12.129.61
Mon Feb 10 09:57:49 2025 daemon.notice netifd: modem_1_1_2_4 (8673): udhcpc: lease of 10.12.129.62 obtained from 10.12.129.61, lease time 7200
Mon Feb 10 09:57:50 2025 daemon.notice netifd: Interface 'modem_1_1_2_4' is now up
Mon Feb 10 09:57:50 2025 user.notice mwan3[8574]: Execute ifup event on interface modem_1_1_2 (wwan0)
Mon Feb 10 09:57:51 2025 user.info mwan3track[24572]: Lost 74 ping(s) on interface modem_1_1_2 (wwan0)
Mon Feb 10 09:57:55 2025 user.notice mwan3[8574]: Starting tracker on interface modem_1_1_2 (wwan0)
Mon Feb 10 09:57:55 2025 user.notice mwan3track[24572]: Stopping mwan3track for interface "modem_1_1_2"
Mon Feb 10 09:58:00 2025 user.info mwan3rtmon[6623]: Detect rtchange event.
Mon Feb 10 09:58:03 2025 user.notice firewall: Reloading firewall due to ifup of modem_1_1_2 (wwan0)
Mon Feb 10 09:58:10 2025 user.notice mwan3[9789]: Execute ifup event on interface modem_1_1_2_4 (wwan0)
Mon Feb 10 09:58:11 2025 user.notice mwan3[9789]: Starting tracker on interface modem_1_1_2_4 (wwan0)
Mon Feb 10 09:58:15 2025 user.info mwan3rtmon[6623]: Detect rtchange event.
Mon Feb 10 09:58:17 2025 user.notice firewall: Reloading firewall due to ifup of modem_1_1_2_4 (wwan0)

For problems (1) and (2), they happen as often as every couple of days!

This is very frustrating, can you please advise on how to troubleshoot and fix these problems???

Thank you.

sa_m · February 12, 2025, 3:12am

Also experienced the same for months. My Mudi V2 cannot acknowledge that it has its own cellular modem inside of itself. Have never really gotten this to work, super frustrating.

> daemon.err modem_AT: (modem_AT.c:154) AT_Read@154 The number of times the epoll reached timeout:30s

For example ^

Cathy · February 12, 2025, 10:17am

Dear @sa_m @mandre96 , regarding the problem of the E750v2 network dropping, we are optimizing the problem, and we currently recommend that you turn off 2.4G wifi and enable 5G wifi only to try. If you need further assistance, please contact support team at support@glinet.biz