Mobile Network Option Doesn't Activate

[sohawiz]

I'm Using Surface Go (1st Gen, 4G Model) and Successfully Installed Chrome OS on my tablet with Brunch Project. Everything work well except mobile network. I'm using 4G Network with SIM card on Window 10, But on Chrome OS, I couldn't found any option to configure it. I only saw 'Wifi Network' Option.

Did Anybody Activate 4G Network in similar case? o couldn't I use Cellular on Chrome OS? Thanks.

[CornishRattler]

Dell Latitude 5290 2in1 mobile network works fine on Chrome

[sohawiz]

Dell Latitude 5290 2in1 mobile network works fine on Chrome

Did you install current version(r83?) and didn't you configure anything to set up mobile network?

Thank you for comment this issue

[CornishRattler]

Current r83 and didn't need to configure anything

[sohawiz]

Current r83 and didn't need to configure anything

Thanks Again, I can just find 'Wi-fi' option, I'll re-install chrome os

[rlapuz94]

I got the surface go as well.

@CornishRattler can you let us know what LTE WWAN card you have?

maybe its a driver issue for us @sohawiz

[CornishRattler]

As I said I have a Dell 5290 not a Surface Go

[sohawiz]

I got the surface go as well.

@CornishRattler can you let us know what LTE WWAN card you have?

maybe its a driver issue for us @sohawiz

I found 'Qualcomm Atheros QCA61x4A Wireless Network Adapter #2' and 'Surface Mobile Broadband' on Device Manager(Network adapter). I'm not sure which is for LTE Service, but I'll update drivers of both adapter

[gyeo-ri]

I got the surface go as well.

@CornishRattler can you let us know what LTE WWAN card you have?

maybe its a driver issue for us @sohawiz

Ahh, I've misunderstood before. You also have same problem, no? Actually I read a case that someone activate Mobile Data succesfully on Surface Go. But I couldn't got anything yet. Do you have any update? I tried a few time but it have never been activated

[sebanc]

Microsoft Surface devices suffer from a specific bug: https://github.com/jakeday/linux-surface/issues/306

What you can try:

1) Identify your usb LTE modem path:

sudo find /sys/bus/usb/devices/ | grep rx_max

2) Create a bootscript (replace the path with the one found in step 1) by running the 5 below commands:

sudo mkdir -p /var/brunch/bootscripts

echo "echo 16383 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh

echo "echo 16383 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

sudo chmod 0755 /var/brunch/bootscripts/lte.sh

[Lupinforlord]

Microsoft Surface devices suffer from a specific bug: jakeday/linux-surface#306

What you can try:

1. Identify your usb LTE modem path:

sudo find /sys/bus/usb/devices/ | grep rx_max

1. Create a bootscript (replace the path with the one found in step 1) by running the 5 below commands:

sudo mkdir -p /var/brunch/bootscripts

echo "echo 16383 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh

echo "echo 16383 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-2/2-2:1.0/net/wwp0s20f0u2/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

sudo chmod 0755 /var/brunch/bootscripts/lte.sh

hi, I did sudo find /sys/bus/usb/devices/ | grep rx_max but nothing happens?

[johnnylau34]

I am using Surface Go 2 LTE m3-8100y version and I got LTE working on Chrome os with below steps, followed by a reboot. Not sure if it works for you too (maybe you need to explore around /sys/bus/usb/devices folder and look for where you can find a net folder too if below does not work for you):

sudo mkdir -p /var/brunch/bootscripts

echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh

echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

sudo chmod 0755 /var/brunch/bootscripts/lte.sh

[Lupinforlord]

I am using Surface Go 2 LTE m3-8100y version and I got LTE working on Chrome os with below steps, followed by a reboot. Not sure if it works for you too (maybe you need to explore around /sys/bus/usb/devices folder and look for where you can find a net folder too if below does not work for you):

sudo mkdir -p /var/brunch/bootscripts

echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh

echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh

sudo chmod 0755 /var/brunch/bootscripts/lte.sh

Hi, which bruch are you using?

[johnnylau34]

I am using Surface Go 2 LTE m3-8100y version and I got LTE working on Chrome os with below steps, followed by a reboot. Not sure if it works for you too (maybe you need to explore around /sys/bus/usb/devices folder and look for where you can find a net folder too if below does not work for you): sudo mkdir -p /var/brunch/bootscripts echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh sudo chmod 0755 /var/brunch/bootscripts/lte.sh

Hi, which bruch are you using?

chronos@localhost / $ cat /etc/brunch_version Brunch r85 k4.19 20200919 chronos@localhost / $

[Lupinforlord]

I am using Surface Go 2 LTE m3-8100y version and I got LTE working on Chrome os with below steps, followed by a reboot. Not sure if it works for you too (maybe you need to explore around /sys/bus/usb/devices folder and look for where you can find a net folder too if below does not work for you): sudo mkdir -p /var/brunch/bootscripts echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh sudo chmod 0755 /var/brunch/bootscripts/lte.sh

Hi, which bruch are you using?

chronos@localhost / $ cat /etc/brunch_version Brunch r85 k4.19 20200919 chronos@localhost / $

Hi, did you do so under terminal in ChromeOS? I saw same files with excately same path as yours in linux mint and did the command but surely nothings works. And with an app called "total command" I can see there is only so far /sys/bus/usb/devices/2-3:1.0/net, nothing is in there, besides wired thing is I can't even see /2-3:1.0 with terminal in ChromeOS....

[Lupinforlord]

I am using Surface Go 2 LTE m3-8100y version and I got LTE working on Chrome os with below steps, followed by a reboot. Not sure if it works for you too (maybe you need to explore around /sys/bus/usb/devices folder and look for where you can find a net folder too if below does not work for you): sudo mkdir -p /var/brunch/bootscripts echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee /var/brunch/bootscripts/lte.sh echo "echo 16383 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/rx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh echo "echo 16384 > /sys/bus/usb/devices/2-3:1.0/net/wwan0/cdc_ncm/tx_max" | sudo tee -a /var/brunch/bootscripts/lte.sh sudo chmod 0755 /var/brunch/bootscripts/lte.sh

Hi, which bruch are you using?

chronos@localhost / $ cat /etc/brunch_version Brunch r85 k4.19 20200919 chronos@localhost / $

Hi, did you do so under terminal in ChromeOS? I saw same files with excately same path as yours in linux mint and did the command but surely nothings works. And with an app called "total command" I can see there is only so far /sys/bus/usb/devices/2-3:1.0/net, nothing is in there, besides wired thing is I can't even see /2-3:1.0 with terminal in ChromeOS....

Succeeded! Turns out you need to:

1. Ctrl+alt+t (go to cross) 2.shell 3.su or sudo su 4.continue with the same commands above.

[Tash254-ke]

I am not conversant with things like this but it looks like we're facing the same issue. I am using ThinkPad T460s and when I put a simcard chrome os doesn't recognize it. I tried the commands above after a long hectic process of looking for sudo su password, and nothing works

crosh> shell chronos@localhost / $ sudo su Password: localhost / # sudo find /sys/bus/usb/devices/ | grep rx_max localhost / # localhost / # sudo find /sys/bus/usb/devices/ | grep rx_max localhost / # localhost / # sudo mkdir -p /var/brunch/bootscripts localhost / # exit exit chronos@localhost / $ sudo su Password: localhost / # sudo mkdir -p /var/brunch/bootscripts localhost / # sudo find /sys/bus/usb/devices/ | grep rx_max localhost / # The simcard doesn't have a pin, I have verified that using a phone, and I have different simcards from different telcos. Anyone knows how I can find a solution? On Lenovo's site, Huawei ME906S this is the WWAN card I think. Thank you.

[sebanc]

@Tash254-ke, your device needs a different configuration, you might want to try the "Linux support" part of the below article: https://toreanderson.github.io/2017/07/31/huawei-me906s-hp-lt4132-linux-ipv6.html

[Tash254-ke]

@Tash254-ke, your device needs a different configuration, you might want to try the "Linux support" part of the below article: https://toreanderson.github.io/2017/07/31/huawei-me906s-hp-lt4132-linux-ipv6.html

I have been away for a while from this laptop. Today I checked this link and usb-devices doesn't even show the modem as per instructions. What could be the reason now?

[Lupinforlord]

How is everyone's lte working? mine works occasionally and doesn't work sometimes after reboot, by cat lte.sh I know the file is unchanged so I have to do chmod again and reboot, then it works. Is there a way to fix this? @sebanc

[Lupinforlord]

also found failure to connect to network while lte indicator still showing after waking from sleep. Currently with brunch r88

[Lupinforlord]

@johnnylau34 Hi, do you remember which rammus is yours? I tried to recreate system img, and tried lte.sh with rammus 90 and r90, r89. They all failed, and now trying rammus 89...

[Lupinforlord]

@johnnylau34 Hi, do you remember which rammus is yours? I tried to recreate system img, and tried lte.sh with rammus 90 and r90, r89. They all failed, and now trying rammus 89...

Done. Turn out rammus 89 and r88 works.

[Lupinforlord]

@sebanc does lte.sh have conflicts with rc.local? I have rc.local activated for mobile broadband in linux mint and now neither of r90 or r89 can have lte running

[Lupinforlord]

@sebanc does lte.sh have conflicts with rc.local? I have rc.local activated for mobile broadband in linux mint and now neither of r90 or r89 can have lte running

I can confirm it's the problem with brunch, no conflicts between lte.sh and rc.local.

[dustojnikhummer]

@sebanc does lte.sh have conflicts with rc.local? I have rc.local activated for mobile broadband in linux mint and now neither of r90 or r89 can have lte running

I can confirm it's the problem with brunch, no conflicts between lte.sh and rc.local.

Hey, almost a year late here. Did you fix this? I have a Surface Go LTE

sudo find /sys/bus/usb/devices/ | grep rx_max returns nothing, BUT /sys/bus/usb/devices/2-3:1.0/net/wwan0/ are there. Built the script you had above but I can't run it, even as a root (sudo su)

[yasurok]

Hi. Just installed chromeos_15117.112.0_rammus on my Surface Pro LTE Advanced (2017, 5th gen). Like many others, I had trouble getting the LTE modem even show up in the Settings.

After a lot of shots in the dark, the following finally gave me the access to the LTE modem on it, and I am happy to report I can get on the Internet through it.

Now please someone advise me where I should place it so it will be run automatically at the right time. I am no IT expert and I have not touched *nix for a few decades. :)

#!/bin/bash

echo 16383 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/rx_max
echo 16383 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/tx_max

echo 16384 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/rx_max
echo 16384 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/tx_max

sudo restart modemmanager

I also have a feeling the find command does not work as it should, which probably led to a lot of confusion in this thread.

[yasurok]

I was taught how to do it by the man himself. :) Lucky me!

[Gd7playz]

Hi. Just installed chromeos_15117.112.0_rammus on my Surface Pro LTE Advanced (2017, 5th gen). Like many others, I had trouble getting the LTE modem even show up in the Settings.

After a lot of shots in the dark, the following finally gave me the access to the LTE modem on it, and I am happy to report I can get on the Internet through it.

Now please someone advise me where I should place it so it will be run automatically at the right time. I am no IT expert and I have not touched *nix for a few decades. :)

#!/bin/bash

echo 16383 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/rx_max
echo 16383 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/tx_max

echo 16384 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/rx_max
echo 16384 | sudo tee /sys/bus/usb/devices/2-2:1.0/net/wwan0/cdc_ncm/tx_max

sudo restart modemmanager

I also have a feeling the find command does not work as it should, which probably led to a lot of confusion in this thread.

Yo, I'm using a lenovo p51 with a sierra EM7455 sim card chip can you show me how you did yours ... (Kindly break down the steps further)

[Caaruzo]

Hi there,

i got the same Problem on my Elitebook 1030 G3. The mobile Option dont show up at all. I also cant find any rx_max or tx_max files.

lspci | grep LTE
6d:00.0 Wireless controller [0d40]: Intel Corporation XMM7360 LTE Advanced Modem (rev 01)

ls -la /sys/bus/pci/devices/0000\:6d\:00.0/
total 0
drwxr-xr-x.  4 root root    0 Mar 28 08:11 .
drwxr-xr-x. 10 root root    0 Mar 28 08:11 ..
-r--r--r--.  1 root root 4096 Mar 28 08:48 aer_dev_correctable
-r--r--r--.  1 root root 4096 Mar 28 08:48 aer_dev_fatal
-r--r--r--.  1 root root 4096 Mar 28 08:48 aer_dev_nonfatal
-r--r--r--.  1 root root 4096 Mar 28 08:48 ari_enabled
-rw-r--r--.  1 root root 4096 Mar 28 08:48 broken_parity_status
-r--r--r--.  1 root root 4096 Mar 28 08:11 class
-rw-r--r--.  1 root root 4096 Mar 28 08:12 config
-r--r--r--.  1 root root 4096 Mar 28 08:48 consistent_dma_mask_bits
-r--r--r--.  1 root root 4096 Mar 28 08:48 current_link_speed
-r--r--r--.  1 root root 4096 Mar 28 08:48 current_link_width
-rw-r--r--.  1 root root 4096 Mar 28 08:48 d3cold_allowed
-r--r--r--.  1 root root 4096 Mar 28 08:11 device
-r--r--r--.  1 root root 4096 Mar 28 08:48 dma_mask_bits
-rw-r--r--.  1 root root 4096 Mar 28 08:48 driver_override
-rw-r--r--.  1 root root 4096 Mar 28 08:48 enable
lrwxrwxrwx.  1 root root    0 Mar 28 08:48 firmware_node -> ../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:4a/device:4b
-r--r--r--.  1 root root 4096 Mar 28 08:48 irq
drwxr-xr-x.  2 root root    0 Mar 28 08:11 link
-r--r--r--.  1 root root 4096 Mar 28 08:48 local_cpulist
-r--r--r--.  1 root root 4096 Mar 28 08:48 local_cpus
-r--r--r--.  1 root root 4096 Mar 28 08:48 max_link_speed
-r--r--r--.  1 root root 4096 Mar 28 08:48 max_link_width
-r--r--r--.  1 root root 4096 Mar 28 08:48 modalias
-rw-r--r--.  1 root root 4096 Mar 28 08:48 msi_bus
drwxr-xr-x.  2 root root    0 Mar 28 08:11 power
-r--r--r--.  1 root root 4096 Mar 28 08:48 power_state
--w--w----.  1 root root 4096 Mar 28 08:48 remove
--w-------.  1 root root 4096 Mar 28 08:48 rescan
--w-------.  1 root root 4096 Mar 28 08:48 reset
-rw-r--r--.  1 root root 4096 Mar 28 08:48 reset_method
-r--r--r--.  1 root root 4096 Mar 28 08:48 resource
-rw-------.  1 root root 4096 Mar 28 08:48 resource0
-rw-------.  1 root root 1024 Mar 28 08:48 resource2
-r--r--r--.  1 root root 4096 Mar 28 08:11 revision
lrwxrwxrwx.  1 root root    0 Mar 28 08:11 subsystem -> ../../../../bus/pci
-r--r--r--.  1 root root 4096 Mar 28 08:11 subsystem_device
-r--r--r--.  1 root root 4096 Mar 28 08:11 subsystem_vendor
-rw-r--r--.  1 root root 4096 Mar 28 08:11 uevent
-r--r--r--.  1 root root 4096 Mar 28 08:48 untrusted
-r--r--r--.  1 root root 4096 Mar 28 08:11 vendor
-r--r--r--.  1 root root 4096 Mar 28 08:48 waiting_for_supplier

lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04f2:b62f Chicony Electronics Co., Ltd HP Full-HD Camera
Bus 001 Device 003: ID 138a:00ab Validity Sensors, Inc. 
Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
Bus 001 Device 005: ID 045e:07b2 Microsoft Corp. Microsoft® Nano Transceiver v1.0
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Hope someone can help me please, get this to work. Thx much.