Quectel EM120R_GL 调制解调器似乎可以工作，但 SIM 卡丢失或未被检测到

Question 1

对于那些拥有笔记本电脑的人来说Lenovo Carbon X1 gen9。

如上所述这里，运行以下脚本将自动修复此问题

#! /bin/bash
# Download network-manager, modem-manager, etc.,...
sudo apt update
sudo apt install network-manager network-manager-gnome modemmanager libqmi-utils gcc
# Reference: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/402#note_1064882
mkdir -p ~/lenovo/snap
cd ~/lenovo
# Download the snap
snap download lenovo-wwan-dpr --edge
# Extract the snap files
sudo mount -t squashfs -o ro lenovo-wwan-dpr_13.snap /home/$(whoami)/lenovo/snap
# Download script by Joar Wandborg
wget https://gist.githubusercontent.com/joar/416f37fe81558f5be0d5131018eb7f2a/raw/b6a2a83620b044efc2d13aee86910743969218de/fcc-unlock.c
# TODO: manually modify the define statements in fcc_unlock.c appropriately
#define MBIM_DEVICE_PATH "/dev/wwan0mbim0"
#define MBIM2SAR_SO_PATH "/home/[username]/lenovo/snap/usr/lib/mbim2sar.so"
sed 's@#define MBIM_DEVICE_PATH \(.*\)$@#define MBIM_DEVICE_PATH "/dev/wwan0mbim0"@g' -i fcc-unlock.c
sed "s@#define MBIM2SAR_SO_PATH \(.*\)\$@#define MBIM2SAR_SO_PATH \"/home/$(whoami)/lenovo/snap/usr/lib/mbim2sar.so\"@g" -i fcc-unlock.c
# Compile the script
gcc -o fcc_unlock_v2 fcc-unlock.c
# Run the script
sudo env VERBOSE=1 ./fcc_unlock_v2 
mmcli -v --modem=`mmcli -L |head -n1 | awk '{print$1}'` -e

Answer

对于那些拥有笔记本电脑的人来说Lenovo Carbon X1 gen9。

如上所述这里，运行以下脚本将自动修复此问题

#! /bin/bash
# Download network-manager, modem-manager, etc.,...
sudo apt update
sudo apt install network-manager network-manager-gnome modemmanager libqmi-utils gcc
# Reference: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/402#note_1064882
mkdir -p ~/lenovo/snap
cd ~/lenovo
# Download the snap
snap download lenovo-wwan-dpr --edge
# Extract the snap files
sudo mount -t squashfs -o ro lenovo-wwan-dpr_13.snap /home/$(whoami)/lenovo/snap
# Download script by Joar Wandborg
wget https://gist.githubusercontent.com/joar/416f37fe81558f5be0d5131018eb7f2a/raw/b6a2a83620b044efc2d13aee86910743969218de/fcc-unlock.c
# TODO: manually modify the define statements in fcc_unlock.c appropriately
#define MBIM_DEVICE_PATH "/dev/wwan0mbim0"
#define MBIM2SAR_SO_PATH "/home/[username]/lenovo/snap/usr/lib/mbim2sar.so"
sed 's@#define MBIM_DEVICE_PATH \(.*\)$@#define MBIM_DEVICE_PATH "/dev/wwan0mbim0"@g' -i fcc-unlock.c
sed "s@#define MBIM2SAR_SO_PATH \(.*\)\$@#define MBIM2SAR_SO_PATH \"/home/$(whoami)/lenovo/snap/usr/lib/mbim2sar.so\"@g" -i fcc-unlock.c
# Compile the script
gcc -o fcc_unlock_v2 fcc-unlock.c
# Run the script
sudo env VERBOSE=1 ./fcc_unlock_v2 
mmcli -v --modem=`mmcli -L |head -n1 | awk '{print$1}'` -e

Question 2

当前形势一片混乱。看看你自己：https://forums.lenovo.com/t5/Fedora/Lenovo-X1-Gen-9-Fedora-and-Quectel-EM120R/mp/5081326

第一步是从 eSIM 切换到真实 SIM：

sudo mmcli -m 1 --set-primary-sim-slot=0

但 SIM 卡仍然无法启用。根据规定，似乎必须通过某种魔法来解锁设备。我编译了此代码这是建议这里。

但在此之前我必须从 snap 中获取 mbim2sar.so 文件：

sudo snap download lenovo-wwan-dpr 
sudo mount -t squashfs -o ro /var/lib/snapd/snaps/lenovo-wwan-dpr_13.snap /home/user/snap/lenovo-wwan-dpr/13/

现在我们可以使用：

#define MBIM2SAR_SO_PATH "/home/user/snap/lenovo-wwan-dpr/13/usr/lib/mbim2sar.so"

gcc fcc-unlock.c -o fcc-unlock
sudo env VERBOSE=1 ./fcc-unlock

一旦运行最后一个命令，我就能够通过 WWAN 调制解调器连接到我的提供商。

但它非常不稳定。例如，当我进行速度测试时，网络管理器中的 WWAN 设置在网络管理器中消失，并且连接断开（如论坛中所述）。要重新启用它，我必须执行以下操作：

systemctl restart ModemManager.service
sudo env VERBOSE=1 ./fcc-unlock

更新：似乎下面链接代码的作者已经做了类似的分步描述这里。

Answer