在ubuntu下，有那么一两次连接成功，不知道为啥
但是之后一直连接不上
scan不到
试了一下dmesg
问题如下，怎么办？
代码： 全选
~$ dmesg|grep -i bluetooth
[ 3.270093] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
[ 3.368567] Bluetooth: Core ver 2.21
[ 3.370058] Bluetooth: HCI device and connection manager initialized
[ 3.370062] Bluetooth: HCI socket layer initialized
[ 3.370065] Bluetooth: L2CAP socket layer initialized
[ 3.370070] Bluetooth: SCO socket layer initialized
[ 3.487969] Bluetooth: hci0: BCM: chip id 70
[ 3.503996] Bluetooth: hci0: mylaptop-0
[ 3.504005] Bluetooth: hci0: BCM (001.001.011) build 0000
[ 3.506965] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[ 3.506970] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[ 5.257497] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 5.257501] Bluetooth: BNEP filters: protocol multicast
[ 5.257506] Bluetooth: BNEP socket layer initialized
[ 5.509555] Bluetooth: hci0 command 0x1003 tx timeout
[ 5.587895] Bluetooth: RFCOMM TTY layer initialized
[ 5.587904] Bluetooth: RFCOMM socket layer initialized
[ 5.587910] Bluetooth: RFCOMM ver 1.11
[ 8154.775157] Modules linked in: xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 af_key xfrm_algo rfcomm bnep wl(POE) intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm irqbypass crct10dif_pclmul btusb crc32_pclmul btrtl btbcm uvcvideo btintel ghash_clmulni_intel bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 aesni_intel videobuf2_core hid_logitech_hidpp v4l2_common videodev media aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi input_leds cfg80211 snd_hda_codec_conexant serio_raw snd_hda_codec_generic lpc_ich snd_hda_intel rtsx_pci_ms snd_hda_codec memstick thinkpad_acpi snd_hda_core snd_hwdep nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_pcm snd_seq snd_seq_device mei_me mei snd_timer shpchp snd soundcore joydev mac_hid parport_pc
[22926.029582] Bluetooth: hci0: BCM: chip id 70
[22926.045599] Bluetooth: hci0: mylaptop-0
[22926.045608] Bluetooth: hci0: BCM (001.001.011) build 0000
[22926.045640] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[22926.045645] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[22936.616982] Bluetooth: hci0 command 0x1003 tx timeout
[22944.462522] Bluetooth: hci0: BCM: chip id 70
[22944.478544] Bluetooth: hci0: mylaptop-0
[22944.478566] Bluetooth: hci0: BCM (001.001.011) build 0000
[22944.478587] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[22944.478590] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[22948.618058] Bluetooth: hci0 command 0x1003 tx timeout
[23658.404579] Bluetooth: hci0: BCM: chip id 70
[23658.420582] Bluetooth: hci0: mylaptop-0
[23658.420601] Bluetooth: hci0: BCM (001.001.011) build 0000
[23658.420623] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[23658.420626] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[23669.228420] Bluetooth: hci0 command 0x1003 tx timeout
[23689.635820] Bluetooth: hci0: BCM: chip id 70
[23689.651829] Bluetooth: hci0: mylaptop-0
[23689.651835] Bluetooth: hci0: BCM (001.001.011) build 0000
[23689.651856] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[23689.651859] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[24943.709589] Bluetooth: hci0: BCM: chip id 70
[24943.725558] Bluetooth: hci0: mylaptop-0
[24943.725568] Bluetooth: hci0: BCM (001.001.011) build 0000
[24943.725607] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[24943.725609] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[24961.660924] Bluetooth: hci0 command 0x1003 tx timeout