EM05-G problem with Linux

IoT Modules LTE Standard Module
1

Hello to all,
I’m using a new laptop, the Lenovo thinkpad L14 Gen 3 model 21C5-CTO1WW with Debian 11 and the kernel updated to version 6.1.0-5-amd64.
The kernel update was needed to detect WiFi, Bluetooth and WWAN hardware components.
All of them are detected correctly, but the only one that does not work is the WWAN, namely the EM05-G.
I tried several SIM cards modifying their APNs, but there’s nothing to do. It’s not working.
The same SIM cards, tested in a tablet, work correctly.
Lenovo Support doesn’t know what to tell me. They repeat that there is only certification for Ubuntu 22.04 LTS, but not even with this distribution the EM05-G works, in fact, among the compatibility list of hardware components of Ubuntu, there is not the Quectel EM05-G.
What can I do?

Thank you.

2

Check with cat /sys/kernel/debug/usb/devices

3

Thanks.
This is the output of cat /sys/kernel/debug/usb/devices

T: Bus=03 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 2 Spd=480 MxCh= 4
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1a40 ProdID=0101 Rev= 1.11
S: Product=USB 2.0 Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=256ms

T: Bus=03 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 4 Spd=480 MxCh= 0
D: Ver= 2.01 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=30c9 ProdID=0050 Rev=10.21
S: Manufacturer=8SSC21D67422V1SR2C70CC3
S: Product=Integrated RGB Camera
S: SerialNumber=01.00.00
C:* #Ifs= 5 Cfg#= 1 Atr=80 MxPwr=500mA
A: FirstIf#= 0 IfCount= 2 Cls=0e(video) Sub=03 Prot=00
A: FirstIf#= 2 IfCount= 2 Cls=0e(video) Sub=03 Prot=00
I:* If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=01 Driver=uvcvideo
E: Ad=87(I) Atr=03(Int.) MxPS= 16 Ivl=16ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
I: If#= 1 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS= 192 Ivl=125us
I: If#= 1 Alt= 2 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS= 384 Ivl=125us
I: If#= 1 Alt= 3 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS= 512 Ivl=125us
I: If#= 1 Alt= 4 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS= 640 Ivl=125us
I: If#= 1 Alt= 5 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS= 800 Ivl=125us
I: If#= 1 Alt= 6 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS= 944 Ivl=125us
I: If#= 1 Alt= 7 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS=1280 Ivl=125us
I: If#= 1 Alt= 8 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS=1600 Ivl=125us
I: If#= 1 Alt= 9 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS=1984 Ivl=125us
I: If#= 1 Alt=10 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS=2880 Ivl=125us
I: If#= 1 Alt=11 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=81(I) Atr=05(Isoc) MxPS=3060 Ivl=125us
I:* If#= 2 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=01 Driver=uvcvideo
E: Ad=84(I) Atr=03(Int.) MxPS= 16 Ivl=16ms
I:* If#= 3 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
I: If#= 3 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=01 Driver=uvcvideo
E: Ad=82(I) Atr=05(Isoc) MxPS=1280 Ivl=125us
I:* If#= 4 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)

T: Bus=03 Lev=01 Prnt=01 Port=03 Cnt=02 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=2c7c ProdID=030a Rev= 2.00
S: Manufacturer=Quectel
S: Product=Quectel EM05-G
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
A: FirstIf#= 0 IfCount= 2 Cls=02(comm.) Sub=0e Prot=00
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=82(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0e Prot=00 Driver=cdc_mbim
E: Ad=84(I) Atr=03(Int.) MxPS= 64 Ivl=32ms
I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
E: Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

T: Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=10000 MxCh= 2
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 3.10 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1
P: Vendor=1d6b ProdID=0003 Rev= 6.01
S: Manufacturer=Linux 6.1.0-5-amd64 xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=0000:07:00.4
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
root@casa03:/home/massimo#

…and this of lsusb
root@casa03:/home/massimo# lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 2c7c:030a Quectel Wireless Solutions Co., Ltd. Quectel EM05-G
Bus 003 Device 004: ID 30c9:0050 Luxvisions Innotech Limited Integrated RGB Camera
Bus 003 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0489:e0d8 Foxconn / Hon Hai Wireless_Device
Bus 001 Device 002: ID 046d:c050 Logitech, Inc. RX 250 Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@casa03:/home/massimo#

4

The modem is detected and drivers are loaded, I see no Quectel related issue.
From what I can see, EM05 is supported by ModemManager, so you should probably follow the MM examples/guidelines available on Internet.

6

you need to go there https://download.lenovo.com/pccbbs/mobiles_pdf/wwan-enablement-on-Linux.pdf and install the FCC unlock utility for your modem. I had the same problem and solved it by this way.
Good Luck :slight_smile: