过去，我曾遇到过蓝牙无法工作的问题。尽管我用ubuntu 14.04 蓝牙 BCM43142 未发现（tx 超时）我仍然遇到延迟和跳过问题14.04 蓝牙滞后（延迟、延迟）和跳过
现在我甚至无法配对到设备。以下是一些详细信息：
$ uname -r
3.19.0-26-generic
$ cat /etc/*release* | grep -i dist
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
$ lspci -nnk | grep -i network -A 2
01:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]
Kernel driver in use: wl
$ lsmod | grep -i 'bluetooth\|btusb\|wl'
btusb 40960 0
wl 6369280 0
cfg80211 524288 1 wl
bluetooth 491520 22 bnep,btusb,rfcomm
$ lsusb | grep -i bluetooth
Bus 004 Device 003: ID 0a5c:21d7 Broadcom Corp. BCM43142 Bluetooth 4.0
T: Bus=04 Lev=02 Prnt=02 Port=04 Cnt=01 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=ff(vend.) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0a5c ProdID=21d7 Rev=01.12
S: Manufacturer=Broadcom Corp
S: Product=BCM43142A0
S: SerialNumber=XXXXXXXXXXXXXX
C: #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I: If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)
$ sudo lshw -c network
*-network
description: Wireless interface
product: BCM43142 802.11b/g/n
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlan0
version: 01
serial: c0:18:85:bc:70:ef
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.248 (r487574) ip=192.168.1.103 latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:16 memory:d0500000-d0507fff
$ dmesg | grep -i bluetooth
[ 3.060119] Bluetooth: Core ver 2.20
[ 3.060139] Bluetooth: HCI device and connection manager initialized
[ 3.060142] Bluetooth: HCI socket layer initialized
[ 3.060145] Bluetooth: L2CAP socket layer initialized
[ 3.060151] Bluetooth: SCO socket layer initialized
[ 3.063204] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 3.063207] Bluetooth: BNEP filters: protocol multicast
[ 3.063210] Bluetooth: BNEP socket layer initialized
[ 3.068272] Bluetooth: RFCOMM TTY layer initialized
[ 3.068279] Bluetooth: RFCOMM socket layer initialized
[ 3.068285] Bluetooth: RFCOMM ver 1.11
[ 3.518076] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
[ 4.108756] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
$ cat /var/log/syslog | grep -i bluetooth
Sep 8 18:33:19 xxxxxx kernel: [ 3.034821] Bluetooth: Core ver 2.20
Sep 8 18:33:19 xxxxxx kernel: [ 3.034838] Bluetooth: HCI device and connection manager initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.034842] Bluetooth: HCI socket layer initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.034845] Bluetooth: L2CAP socket layer initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.034850] Bluetooth: SCO socket layer initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.046775] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Sep 8 18:33:19 xxxxxx kernel: [ 3.046778] Bluetooth: BNEP filters: protocol multicast
Sep 8 18:33:19 xxxxxx kernel: [ 3.046783] Bluetooth: BNEP socket layer initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.047732] Bluetooth: RFCOMM TTY layer initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.047739] Bluetooth: RFCOMM socket layer initialized
Sep 8 18:33:19 xxxxxx kernel: [ 3.047744] Bluetooth: RFCOMM ver 1.11
Sep 8 18:33:20 xxxxxx bluetoothd[540]: Unknown command complete for opcode 19
Sep 8 18:33:20 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been enabled
Sep 8 18:33:20 xxxxxx bluetoothd[540]: sap-dummy interface org.bluez.SimAccessTest init failed on path /org/bluez/test
Sep 8 18:33:20 xxxxxx bluetoothd[540]: Sap driver initialization failed.
Sep 8 18:33:20 xxxxxx bluetoothd[540]: sap-server: Operation not permitted (1)
Sep 8 18:33:20 xxxxxx bluetoothd[540]: Unknown command complete for opcode 19
Sep 8 18:33:20 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci1 has been enabled
Sep 8 18:33:20 xxxxxx kernel: [ 3.416582] Bluetooth: hci1: BCM: patching hci_ver=06 hci_rev=0000 lmp_ver=06 lmp_subver=210b
Sep 8 18:33:20 xxxxxx kernel: [ 3.969139] Bluetooth: hci1: BCM: firmware hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/HFPAG
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/HFPHS
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/A2DPSource
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/A2DPSink
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/HFPAG
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/HFPHS
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/A2DPSource
Sep 8 18:33:23 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.33 path=/MediaEndpoint/A2DPSink
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/HFPAG
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/HFPHS
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSource
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSink
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/HFPAG
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/HFPHS
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSource
Sep 8 18:33:54 xxxxxx bluetoothd[540]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSink
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/HFPAG
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/HFPHS
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/A2DPSource
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/A2DPSink
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/HFPAG
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/HFPHS
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/A2DPSource
Sep 8 18:33:55 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.70 path=/MediaEndpoint/A2DPSink
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/HFPAG
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/HFPHS
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/A2DPSource
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/A2DPSink
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/HFPAG
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/HFPHS
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/A2DPSource
Sep 8 18:34:13 xxxxxx bluetoothd[540]: Endpoint unregistered: sender=:1.33 path=/MediaEndpoint/A2DPSink
Sep 8 18:34:13 xxxxxx bluetoothd[540]: hci0: Remove UUID (0x0011) failed: Busy (0x0a)
Sep 8 18:34:13 xxxxxx bluetoothd[540]: hci1: Remove UUID (0x0011) failed: Busy (0x0a)
Sep 8 18:47:32 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been disabled
Sep 8 18:47:32 xxxxxx bluetoothd[540]: Unregister path: /org/bluez/540/hci0
Sep 8 18:47:32 xxxxxx bluetoothd[540]: hci0: Set IO Capability (0x0018) failed: Invalid Index (0x11)
Sep 8 18:47:38 xxxxxx bluetoothd[540]: sap-dummy interface org.bluez.SimAccessTest init failed on path /org/bluez/test
Sep 8 18:47:38 xxxxxx bluetoothd[540]: Sap driver initialization failed.
Sep 8 18:47:38 xxxxxx bluetoothd[540]: sap-server: Operation not permitted (1)
Sep 8 18:47:38 xxxxxx bluetoothd[540]: Unknown command complete for opcode 19
Sep 8 18:47:39 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been enabled
Sep 8 18:58:03 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci1 has been disabled
Sep 8 18:58:07 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci1 has been enabled
Sep 8 18:58:38 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been disabled
Sep 8 18:58:38 xxxxxx bluetoothd[540]: Unregister path: /org/bluez/540/hci0
Sep 8 18:58:38 xxxxxx bluetoothd[540]: hci0: Set IO Capability (0x0018) failed: Invalid Index (0x11)
Sep 8 18:58:39 xxxxxx bluetoothd[540]: sap-dummy interface org.bluez.SimAccessTest init failed on path /org/bluez/test
Sep 8 18:58:39 xxxxxx bluetoothd[540]: Sap driver initialization failed.
Sep 8 18:58:39 xxxxxx bluetoothd[540]: sap-server: Operation not permitted (1)
Sep 8 18:58:39 xxxxxx bluetoothd[540]: Unknown command complete for opcode 19
Sep 8 18:58:39 xxxxxx bluetoothd[540]: hci0: Set Powered (0x0005) failed: Busy (0x0a)
Sep 8 18:58:39 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been enabled
Sep 8 18:58:39 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been disabled
Sep 8 18:58:39 xxxxxx bluetoothd[540]: Unregister path: /org/bluez/540/hci0
Sep 8 18:58:39 xxxxxx bluetoothd[540]: hci0: Set IO Capability (0x0018) failed: Invalid Index (0x11)
Sep 8 18:58:47 xxxxxx bluetoothd[540]: sap-dummy interface org.bluez.SimAccessTest init failed on path /org/bluez/test
Sep 8 18:58:47 xxxxxx bluetoothd[540]: Sap driver initialization failed.
Sep 8 18:58:47 xxxxxx bluetoothd[540]: sap-server: Operation not permitted (1)
Sep 8 18:58:47 xxxxxx bluetoothd[540]: Unknown command complete for opcode 19
Sep 8 18:58:47 xxxxxx bluetoothd[540]: Adapter /org/bluez/540/hci0 has been enabled
Sep 8 19:01:14 xxxxxx bluetoothd[540]: Discovery session 0x7f44df770ad0 with :1.97 activated
Sep 8 19:01:21 xxxxxx bluetoothd[540]: Stopping discovery
Sep 8 19:01:22 xxxxxx bluetoothd[540]: Discovery session 0x7f44df76fbc0 with :1.97 activated
Sep 8 19:01:33 xxxxxx bluetoothd[540]: Stopping discovery
Sep 8 19:01:50 xxxxxx bluetoothd[540]: Unable to select SEP
Sep 8 19:06:44 xxxxxx bluetoothd[540]: message repeated 5 times: [ Unable to select SEP]
Sep 8 19:07:01 xxxxxx bluetoothd[540]: Discovery session 0x7f44df763bf0 with :1.97 activated
Sep 8 19:07:12 xxxxxx bluetoothd[540]: Stopping discovery
Sep 8 19:07:37 xxxxxx bluetoothd[540]: Unable to select SEP
Sep 8 19:08:10 xxxxxx bluetoothd[540]: message repeated 2 times: [ Unable to select SEP]
Sep 8 19:08:49 xxxxxx bluetoothd[540]: No GATT server found in C0:18:85:BC:70:F0
Sep 8 19:08:49 xxxxxx bluetoothd[540]: No GATT server found in C0:18:85:BC:70:F0
Sep 8 19:08:49 xxxxxx bluetoothd[540]: Attribute server attach failure!
Sep 8 19:09:19 xxxxxx kernel: [ 2165.739633] bluetoothd[540]: segfault at c8 ip 00007f44dea88700 sp 00007fff7bd3cf18 error 4 in libdbus-1.so.3.7.6[7f44dea7f000+44000]
Sep 8 19:09:19 xxxxxx kernel: [ 2165.859147] init: bluetooth main process (540) killed by SEGV signal
Sep 8 19:09:19 xxxxxx kernel: [ 2165.859161] init: bluetooth main process ended, respawning
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Bluetooth daemon 4.101
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Starting SDP server
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: DIS cannot start: GATT is disabled
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Failed to init deviceinfo plugin
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Failed to init proximity plugin
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Failed to init time plugin
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Failed to init alert plugin
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Failed to init thermometer plugin
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Failed to init gatt_example plugin
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Bluetooth Management interface initialized
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Adapter /org/bluez/4981/hci0 has been enabled
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: sap-dummy interface org.bluez.SimAccessTest init failed on path /org/bluez/test
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Sap driver initialization failed.
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: sap-server: Operation not permitted (1)
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Adapter /org/bluez/4981/hci1 has been enabled
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Unknown command complete for opcode 19
Sep 8 19:09:19 xxxxxx bluetoothd[4981]: Unknown command complete for opcode 19
Sep 8 19:09:35 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e9059c0 with :1.103 activated
Sep 8 19:09:43 xxxxxx bluetoothd[4981]: Unknown command complete for opcode 37
Sep 8 19:10:00 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:10:05 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:11:00 xxxxxx bluetoothd[4981]: message repeated 5 times: [ Unable to select SEP]
Sep 8 19:11:03 xxxxxx bluetoothd[4981]: Adapter /org/bluez/4981/hci0 has been disabled
Sep 8 19:11:03 xxxxxx bluetoothd[4981]: Unregister path: /org/bluez/4981/hci0
Sep 8 19:11:07 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8e9dd0 with :1.104 activated
Sep 8 19:11:11 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:11:12 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8ee3c0 with :1.104 activated
Sep 8 19:11:22 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:11:47 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:12:03 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8f3a60 with :1.104 activated
Sep 8 19:12:13 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:12:26 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:13:19 xxxxxx bluetoothd[4981]: message repeated 3 times: [ Unable to select SEP]
Sep 8 19:13:29 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8ee3c0 with :1.104 activated
Sep 8 19:13:39 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:14:05 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:14:21 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:14:26 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8f14b0 with :1.104 activated
Sep 8 19:14:36 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:14:56 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:15:01 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8ee3c0 with :1.104 activated
Sep 8 19:15:11 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:15:36 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8e9dd0 with :1.104 activated
Sep 8 19:15:46 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:16:22 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:19:29 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:19:35 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e8ee3c0 with :1.104 activated
Sep 8 19:19:45 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:20:10 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:20:27 xxxxxx bluetoothd[4981]: Discovery session 0x7f3e3e907400 with :1.104 activated
Sep 8 19:20:37 xxxxxx bluetoothd[4981]: Stopping discovery
Sep 8 19:20:57 xxxxxx bluetoothd[4981]: Unable to select SEP
Sep 8 19:21:30 xxxxxx bluetoothd[4981]: Terminating
Sep 8 19:21:30 xxxxxx bluetoothd[4981]: Stopping SDP server
Sep 8 19:21:30 xxxxxx bluetoothd[4981]: Exit
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Bluetooth daemon 4.101
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Starting SDP server
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: DIS cannot start: GATT is disabled
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Failed to init deviceinfo plugin
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Failed to init proximity plugin
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Failed to init time plugin
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Failed to init alert plugin
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Failed to init thermometer plugin
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Failed to init gatt_example plugin
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Bluetooth Management interface initialized
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Adapter /org/bluez/5300/hci1 has been enabled
Sep 8 19:21:30 xxxxxx bluetoothd[5300]: Unknown command complete for opcode 19
Sep 8 19:22:50 xxxxxx bluetoothd[5300]: Unable to select SEP
Sep 8 19:25:17 xxxxxx kernel: [ 3.054018] Bluetooth: Core ver 2.20
Sep 8 19:25:17 xxxxxx kernel: [ 3.054033] Bluetooth: HCI device and connection manager initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.054037] Bluetooth: HCI socket layer initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.054039] Bluetooth: L2CAP socket layer initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.054045] Bluetooth: SCO socket layer initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.057103] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Sep 8 19:25:17 xxxxxx kernel: [ 3.057106] Bluetooth: BNEP filters: protocol multicast
Sep 8 19:25:17 xxxxxx kernel: [ 3.057110] Bluetooth: BNEP socket layer initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.069291] Bluetooth: RFCOMM TTY layer initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.069299] Bluetooth: RFCOMM socket layer initialized
Sep 8 19:25:17 xxxxxx kernel: [ 3.069305] Bluetooth: RFCOMM ver 1.11
Sep 8 19:25:18 xxxxxx bluetoothd[545]: Unknown command complete for opcode 19
Sep 8 19:25:18 xxxxxx bluetoothd[545]: Adapter /org/bluez/545/hci0 has been enabled
Sep 8 19:25:18 xxxxxx kernel: [ 3.462801] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
Sep 8 19:25:18 xxxxxx kernel: [ 4.058914] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
Sep 8 19:25:21 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/HFPAG
Sep 8 19:25:21 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/HFPHS
Sep 8 19:25:21 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/A2DPSource
Sep 8 19:25:21 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/A2DPSink
Sep 8 19:25:51 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.71 path=/MediaEndpoint/HFPAG
Sep 8 19:25:51 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.71 path=/MediaEndpoint/HFPHS
Sep 8 19:25:51 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.71 path=/MediaEndpoint/A2DPSource
Sep 8 19:25:51 xxxxxx bluetoothd[545]: Endpoint registered: sender=:1.71 path=/MediaEndpoint/A2DPSink
Sep 8 19:25:52 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.71 path=/MediaEndpoint/HFPAG
Sep 8 19:25:52 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.71 path=/MediaEndpoint/HFPHS
Sep 8 19:25:52 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.71 path=/MediaEndpoint/A2DPSource
Sep 8 19:25:52 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.71 path=/MediaEndpoint/A2DPSink
Sep 8 19:26:10 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/HFPAG
Sep 8 19:26:10 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/HFPHS
Sep 8 19:26:10 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/A2DPSource
Sep 8 19:26:10 xxxxxx bluetoothd[545]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/A2DPSink
Sep 8 19:26:10 xxxxxx bluetoothd[545]: hci0: Remove UUID (0x0011) failed: Busy (0x0a)
Sep 8 19:26:54 xxxxxx bluetoothd[545]: Discovery session 0x7eff0913d5a0 with :1.94 activated
Sep 8 19:27:05 xxxxxx bluetoothd[545]: Stopping discovery
Sep 8 19:28:56 xxxxxx bluetoothd[545]: Unable to select SEP
Sep 8 19:33:34 xxxxxx bluetoothd[545]: message repeated 2 times: [ Unable to select SEP]
Sep 8 19:36:20 xxxxxx bluetoothd[545]: Terminating
Sep 8 19:36:20 xxxxxx bluetoothd[545]: Stopping SDP server
Sep 8 19:36:20 xxxxxx bluetoothd[545]: Exit
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Bluetooth daemon 4.101
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Starting SDP server
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: DIS cannot start: GATT is disabled
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Failed to init deviceinfo plugin
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Failed to init proximity plugin
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Failed to init time plugin
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Failed to init alert plugin
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Failed to init thermometer plugin
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Failed to init gatt_example plugin
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Bluetooth Management interface initialized
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Adapter /org/bluez/4344/hci0 has been enabled
Sep 8 19:36:23 xxxxxx bluetoothd[4344]: Unknown command complete for opcode 19
Sep 8 19:38:56 xxxxxx kernel: [ 3.060119] Bluetooth: Core ver 2.20
Sep 8 19:38:56 xxxxxx kernel: [ 3.060139] Bluetooth: HCI device and connection manager initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.060142] Bluetooth: HCI socket layer initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.060145] Bluetooth: L2CAP socket layer initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.060151] Bluetooth: SCO socket layer initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.063204] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Sep 8 19:38:56 xxxxxx kernel: [ 3.063207] Bluetooth: BNEP filters: protocol multicast
Sep 8 19:38:56 xxxxxx kernel: [ 3.063210] Bluetooth: BNEP socket layer initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.068272] Bluetooth: RFCOMM TTY layer initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.068279] Bluetooth: RFCOMM socket layer initialized
Sep 8 19:38:56 xxxxxx kernel: [ 3.068285] Bluetooth: RFCOMM ver 1.11
Sep 8 19:38:57 xxxxxx bluetoothd[558]: Unknown command complete for opcode 19
Sep 8 19:38:57 xxxxxx kernel: [ 3.518076] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
Sep 8 19:38:57 xxxxxx kernel: [ 4.108756] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=007e lmp_ver=06 lmp_subver=210b
Sep 8 19:38:57 xxxxxx bluetoothd[558]: Adapter /org/bluez/558/hci0 has been enabled
Sep 8 19:39:00 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/HFPAG
Sep 8 19:39:00 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/HFPHS
Sep 8 19:39:00 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/A2DPSource
Sep 8 19:39:00 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.35 path=/MediaEndpoint/A2DPSink
Sep 8 19:39:05 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.62 path=/MediaEndpoint/HFPAG
Sep 8 19:39:05 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.62 path=/MediaEndpoint/HFPHS
Sep 8 19:39:05 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.62 path=/MediaEndpoint/A2DPSource
Sep 8 19:39:05 xxxxxx bluetoothd[558]: Endpoint registered: sender=:1.62 path=/MediaEndpoint/A2DPSink
Sep 8 19:39:06 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.62 path=/MediaEndpoint/HFPAG
Sep 8 19:39:06 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.62 path=/MediaEndpoint/HFPHS
Sep 8 19:39:06 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.62 path=/MediaEndpoint/A2DPSource
Sep 8 19:39:06 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.62 path=/MediaEndpoint/A2DPSink
Sep 8 19:39:24 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/HFPAG
Sep 8 19:39:24 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/HFPHS
Sep 8 19:39:24 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/A2DPSource
Sep 8 19:39:24 xxxxxx bluetoothd[558]: Endpoint unregistered: sender=:1.35 path=/MediaEndpoint/A2DPSink
Sep 8 19:39:24 xxxxxx bluetoothd[558]: hci0: Remove UUID (0x0011) failed: Busy (0x0a)
Sep 8 19:40:56 xxxxxx bluetoothd[558]: Discovery session 0x7f631cc6c5a0 with :1.92 activated
Sep 8 19:41:07 xxxxxx bluetoothd[558]: Stopping discovery
Sep 8 19:41:40 xxxxxx bluetoothd[558]: Unable to select SEP
请查看最后一条消息（Unable to select SEP），也许这指向某处。
我在网上找不到任何解决方案。