# 树莓派开发常见问题记录
# 蓝牙
# src/main.c:parse_controller_config() Key file does not have group “Controller”【解决】
# 查看蓝牙启动状态报错如下
summergao@ubuntu:~$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2021-04-21 12:13:59 CST; 15s ago
Docs: man:bluetoothd(8)
Main PID: 2453 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 8966)
CGroup: /system.slice/bluetooth.service
└─2453 /usr/lib/bluetooth/bluetoothd
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: src/main.c:parse_controller_config() Key file does not have group “Controller”
4月 21 12:13:59 ubuntu bluetoothd[2453]: Starting SDP server
4月 21 12:13:59 ubuntu bluetoothd[2453]: Bluetooth management interface 1.17 initialized
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历经各种尝试，发现最暴力的解决方式还是卸载重装。
# 解决办法
卸载所有蓝牙相关软件包
sudo apt-get purge bluez*
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# 重装 pi-bluetooth
sudo apt-get install pi-bluetooth
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重新配置，在第二次执行成功
sudo hciattach /dev/ttyAMA0 bcm43xx 921600 noflow -
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# 解决 bcm43xx_init Failed to write reset command Can't initialize device: Success 问题
# 问题描述安装蓝牙初始化配置时报错：
sudo hciattach /dev/ttyAMA0 bcm43xx 921600 noflow -
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# 解决办法卸载重装
sudo apt-get purge bluez*
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# 升级重装
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get dist-upgrade -y
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sudo apt-get install pi-bluetooth blueman
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# 重试，在第二次执行成功
sudo hciattach /dev/ttyAMA0 bcm43xx 921600 noflow -
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添加pi用户到蓝牙组
sudo usermod -G bluetooth -a pi
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# 重启
sudo reboot
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# 安装
# E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2796 (unattended-upgr) 【解决】
# 树莓派4B解决：
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2796 (unattended-upgr)
N: Be aware that removing the lock file is not a solution and may break your system.
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it
# 查看进程
ps -aux
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# 结束报错里面的进程
sudo kill -9 2796
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# 重新安装
sudo apt-get install libmagickcore-dev
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