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Paper Tape
Posts: 1
Registered: ‎12-01-2017
Location: FI
Views: 1,218
Message 1 of 1

T470 20HE EM7430 LTE modem not detected

I'm trying to have Sierra EM7430 LTE modem working on T470 but I'm simply not able to get OS detect anything modem related


Here it's claimed that there is some support

Hardware Compatibility

The Sierra Wireless EM7430 Embedded Module is supported on the following Lenovo systems:
ThinkPad P51s, X1 Yoga, L470, T470, X1 Carbon, T470s, T470p, X270

And this should not be that different from EM7455 which people have working


Currently running ubuntu 16.04 - 4.10.0-40-generic


I would expect to see something in lsusb but nope

Bus 002 Device 003: ID 0bda:0316 Realtek Semiconductor Corp.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 138a:0097 Validity Sensors, Inc.
Bus 001 Device 003: ID 04f2:b5ab Chicony Electronics Co., Ltd
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 005: ID 04f3:22a7 Elan Microelectronics Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Nothing in lspci

00:00.0 Host bridge: Intel Corporation Device 5904 (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Device 5916 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI (rev 21)
00:1c.0 PCI bridge: Intel Corporation Device 9d10 (rev f1)
00:1c.6 PCI bridge: Intel Corporation Device 9d16 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Device 9d18 (rev f1)
00:1d.2 PCI bridge: Intel Corporation Device 9d1a (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d4e (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-LM (rev 21)
04:00.0 Network controller: Intel Corporation Device 24fd (rev 78)
3e:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a808


Logically installed ModemManager is not able to detect anything either

systemd[1]: Starting Modem Manager...
ModemManager[961]: <info>  ModemManager (version 1.4.12) starting in system bus...
systemd[1]: Started Modem Manager.
ModemManager[961]: <info>  Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.6/0000:04:00.0': not supported by any plugin
ModemManager[961]: <info>  Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1f.6': not supported by any plugin



I don't get any "1802 unauthorized network card" error on boot up. I've also tried what was suggested on forums for installation procedure. Mainly:


Firstly, check out the BIOS Setup:
Security menu -> I/O Ports Access.
"Wireless WAN" device should be enabled.

How did you insert the wwan card? I mean mandatory disabling internal battery in the BIOS Setup and disconnection the AC charger. I'm afraid you didn't disable that battery. 

In this case perform the BIOS/EC reset:
- enter the BIOS Setup, Config menu, Power submenu, Disable Built-in battery - Enter
- laptop will power off
- unplug AC charger
- press and hold the power button for 20...30 seconds

Plug in the AC charger, power on laptop, enter the BIOS Setup, load default settings, save them. If you had your own, specific BIOS settings, apply them.

Boot laptop, check out the wwan card state. It should be recognized by system.



Does anyone have ideas how to get this LTE modem detected by T470 laptop? Even troubleshoot ideas? After a day of research I'm a bit out of things to try and didn't find people really doing the same


I guess this would be too easy if modem was somehow visible to OS Smiley Sad

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