在一次系统更新后，重启发现蓝牙无法使用，表现为:
右上角的Bluetooth图标闪烁，设置选项里的Bluetooth在"Bluetooth Turned Off"和"No Bluetooth Found"之间来回闪烁。
使用bluetoothctl工具,会提示"No default controller available"
bluetooth.service日志如下：
bluetoothd[4365]: Bluetooth daemon 5.66 systemd[1]: Started Bluetooth service. bluetoothd[4365]: Starting SDP server bluetoothd[4365]: profiles/audio/vcp.c:vcp_init() D-Bus experimental not enabled bluetoothd[4365]: src/plugin.c:plugin_init() Failed to init vcp plugin bluetoothd[4365]: profiles/audio/mcp.c:mcp_init() D-Bus experimental not enabled bluetoothd[4365]: src/plugin.c:plugin_init() Failed to init mcp plugin bluetoothd[4365]: profiles/audio/bap.c:bap_init() D-Bus experimental not enabled bluetoothd[4365]: src/plugin.c:plugin_init() Failed to init bap plugin bluetoothd[4365]: Bluetooth management interface 1.22 initialized
通过搜索日志中的错误信息，得到的方案是：
修改 /etc/bluetooth/main.conf中的Experimental选项为true
标签：4365,plugin,bluetoothd,蓝牙,Bluetooth,Failed,init,Linux,Arch From： https://www.cnblogs.com/mingcc/p/17110079.html