a-c-sreedhar-reddy's questions

我无法找到并连接到蓝牙设备。

命令的输出：lspci -knn | grep Net -A3; lsusb; rfkill list

13:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Hewlett-Packard Company BCM43142 802.11b/g/n [103c:804a]
    Kernel driver in use: wl
    Kernel modules: wl
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 064e:930b Suyin Corp. 
Bus 001 Device 002: ID 0a5c:216d Broadcom Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: brcmwl-0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
49: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

我首先在 Windows 中连接了蓝牙设备。后来我格式化了windows分区。现在，当我尝试在 Ubuntu 中连接蓝牙设备时，我无法连接。我知道我们需要在 Windows 中生成的密钥。但是我从我的机器上删除了窗口。我该如何解决这个问题？

结果dmesg |grep -i blue是

[   12.869438] Bluetooth: Core ver 2.20
[   12.869456] Bluetooth: HCI device and connection manager initialized
[   12.869459] Bluetooth: HCI socket layer initialized
[   12.869462] Bluetooth: L2CAP socket layer initialized
[   12.869468] Bluetooth: SCO socket layer initialized
[   12.896508] bluetooth hci0: Direct firmware load for brcm/BCM43142A0-0a5c-216d.hcd failed with error -2
[   12.896513] Bluetooth: hci0: BCM: patch brcm/BCM43142A0-0a5c-216d.hcd not found
[   14.437557] Bluetooth: RFCOMM TTY layer initialized
[   14.437563] Bluetooth: RFCOMM socket layer initialized
[   14.437568] Bluetooth: RFCOMM ver 1.11
[   14.484529] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   14.484531] Bluetooth: BNEP filters: protocol multicast
[   14.484534] Bluetooth: BNEP socket layer initialized
[   14.901392] Bluetooth: hci0 command 0x1003 tx timeout
[  765.511199] Modules linked in: bnep rfcomm nls_iso8859_1 uvcvideo videobuf2_vmalloc btusb videobuf2_memops videobuf2_core bluetooth v4l2_common videodev media wl(POE) snd_hda_codec_hdmi hp_wmi amdkfd sparse_keymap amd_iommu_v2 radeon intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev serio_raw snd_soc_rt286 cfg80211 snd_soc_core snd_compress i915 snd_pcm_dmaengine snd_hda_codec_realtek lpc_ich snd_hda_codec_generic ttm drm_kms_helper mei_me shpchp mei snd_hda_intel snd_hda_controller drm processor_thermal_device snd_hda_codec snd_hwdep i2c_algo_bit wmi snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi int3403_thermal snd_seq snd_seq_device snd_timer video snd i2c_hid hid dw_dmac soundcore dw_dmac_core snd_soc_sst_acpi i2c_designware_platform i2c_designware_core hp_wireless spi_pxa2xx_platform int3402_thermal 8250_dw int3400_thermal acpi_thermal_rel mac_hid acpi_pad parport_pc ppdev lp parport psmouse ahci r8169 libahci mii sdhci_acpi sdhci

我添加了brcm/BCM43142A0-0a5c-216d.hcd文件并重新启动。我可以连接到我的蓝牙扬声器，但无法播放音频。我在声音设置输出中找不到我的扬声器。

我不知道为什么，但是在蓝牙设备上播放时会发出声音。

我使用useradd命令创建了一个新用户，例如：

sudo useradd acreddy

然后创建了新用户，但它要求输入密码，密码是什么？