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错误提示如下:
Failed to connect: org.bluez.Error.Failed
bluetooth.service - Bluetooth service
Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; disabled; vendor preset: disabled)
Active: active (running) since Sun 2020-01-12 14:24:07 CST; 2 days ago
Main PID: 14552 (bluetoothd)
Status: "Running"
Memory: 444.0K
CGroup: /system.slice/bluetooth.service
└─14552 /usr/lib/bluetooth/bluetoothd
Jan 12 23:42:12 CoreELEC bluetoothd[14552]: sdp_service_search_attr_async: Error sending data:Transport endpoint is not connected
Jan 12 23:42:12 CoreELEC bluetoothd[14552]: **:**:**:**:**:**:**: error updating services: Input/output error (5)
Jan 12 23:42:31 CoreELEC bluetoothd[14552]: sdp_service_search_attr_async: Error sending data:Transport endpoint is not connected
Jan 12 23:42:31 CoreELEC bluetoothd[14552]: **:**:**:**:**:**:**: error updating services: Input/output error (5)
Jan 14 20:37:03 CoreELEC bluetoothd[14552]: Endpoint registered: sender=:1.58 path=/MediaEndpoint/A2DPSource
Jan 14 20:37:03 CoreELEC bluetoothd[14552]: Endpoint registered: sender=:1.58 path=/MediaEndpoint/A2DPSink
● bluetooth.service - Bluetooth service
-- Logs begin at Sun 2020-01-12 10:03:15 CST, end at Tue 2020-01-14 20:54:28 CST. --
Jan 14 20:37:03 CoreELEC bluetoothd[14552]: Endpoint registered: sender=:1.58 path=/MediaEndpoint/A2DPSink
Jan 14 20:37:08 CoreELEC kernel: aml_spdif_dai: aiu 958 playback disable
Jan 14 20:37:24 CoreELEC connmand[2682]: ntp: adjust (slew): -0.005343 sec
Jan 14 20:45:58 CoreELEC bluetoothd[14552]: sdp_service_search_attr_async: Error sending data:Transport endpoint is not connected
Jan 14 20:45:58 CoreELEC bluetoothd[14552]: **:**:**:**:**:**:**: error updating services: Input/output error (5)
Jan 14 20:46:52 CoreELEC bluetoothd[14552]: **:**:**:**:**:**:**: error updating services: Connection timed out (110)
Jan 14 20:47:44 CoreELEC bluetoothd[14552]: **:**:**:**:**:**:**: error updating services: Operation already in progress (114)
Jan 14 20:53:39 CoreELEC pulseaudio[3853]: Module "module-bluetooth-discover" should be loaded once at most. Refusing to load.
Jan 14 20:53:59 CoreELEC bluetoothd[14552]: Endpoint unregistered: sender=:1.58 path=/MediaEndpoint/A2DPSource
Jan 14 20:53:59 CoreELEC bluetoothd[14552]: Endpoint unregistered: sender=:1.58 path=/MediaEndpoint/A2DPSink
Jan 14 20:53:59 CoreELEC kernel: aml_spdif_dai: aml_hw_iec958_init,runtime->rate=44100, runtime->channels=2, same source mode(0)
Jan 14 20:53:59 CoreELEC kernel: aml_spdif_dai: set normal 512 fs /4 fs
Jan 14 20:53:59 CoreELEC kernel: aml_audio_hw: IEC958 16bit
Jan 14 20:53:59 CoreELEC kernel: hdmitx: audio: aout notify rate 44100
Jan 14 20:53:59 CoreELEC kernel: hdmitx: audio: aout notify size 16
Jan 14 20:53:59 CoreELEC kernel: hdmitx: audio: no update
Jan 14 20:53:59 CoreELEC kernel: aml_spdif_dai: aiu 958 playback enable
Jan 14 20:53:59 CoreELEC kernel: aml_audio_hw: i2sin_fifo0_set_buf
Jan 14 20:53:59 CoreELEC kernel: aml_spdif_dai: aiu 958 playback disable
Jan 14 20:54:28 CoreELEC connmand[2682]: ntp: adjust (slew): -0.013615 sec
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