今天，我在Lenovo S20-30上安装了Ubuntu，大多数功能正常，但是我不能使用蓝牙。在系统偏好设置中，我可以将蓝牙开关更改为“ on”，但是当我回到窗格时，它再次为“ off”。此外，菜单栏中缺少蓝牙符号，并且还选中了“首选项”窗格中的框。
由于我是Linux领域的新手，所以我不知道您需要更多的信息来进行诊断，但是以下一些信息可能会有所帮助：
$ dmesg | grep Bluetooth
[ 14.677429] Bluetooth: Core ver 2.19
[ 14.677466] Bluetooth: HCI device and connection manager initialized
[ 14.677477] Bluetooth: HCI socket layer initialized
[ 14.677481] Bluetooth: L2CAP socket layer initialized
[ 14.677497] Bluetooth: SCO socket layer initialized
[ 14.723428] Bluetooth: RFCOMM TTY layer initialized
[ 14.723443] Bluetooth: RFCOMM socket layer initialized
[ 14.723451] Bluetooth: RFCOMM ver 1.11
[ 15.038890] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 15.038895] Bluetooth: BNEP filters: protocol multicast
[ 15.038905] Bluetooth: BNEP socket layer initialized
和
$ sudo rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
3: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
和
$ sudo lsmod | grep bluetooth
bluetooth 446409 10 bnep,rfcomm
6lowpan_iphc 18702 1 bluetooth
和
$ uname -a; lsusb
Linux tobis-lenovo 3.16.0-31-generic #43~14.04.1-Ubuntu SMP Tue Mar 10 20:13:38 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 004: ID 105b:e065
Bus 001 Device 003: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 002: ID 5986:054a Acer, Inc
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
从Jeremy31的脚本输出：
$ dmesg | tail -15
[ 18.881813] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 18.881816] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 22.074707] init: plymouth-upstart-bridge main process ended, respawning
[ 22.100053] init: plymouth-upstart-bridge main process ended, respawning
[ 45.348105] audit_printk_skb: 135 callbacks suppressed
[ 45.348111] audit: type=1400 audit(1427026413.699:72): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=2333 comm="apparmor_parser"
[ 45.348126] audit: type=1400 audit(1427026413.699:73): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2333 comm="apparmor_parser"
[ 45.349128] audit: type=1400 audit(1427026413.699:74): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2333 comm="apparmor_parser"
[ 154.979500] systemd-hostnamed[2562]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
[ 1063.242591] systemd-hostnamed[8556]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
[ 2549.195081] systemd-hostnamed[16264]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
[ 2712.987102] usbcore: registered new interface driver btusb
[ 2713.065862] bluetooth hci0: Direct firmware load failed with error -2
[ 2713.065868] bluetooth hci0: Falling back to user helper
[ 2713.141987] Bluetooth: hci0: BCM: patch brcm/BCM43142A0-105b-e065.hcd not found
好的，内核中尚不支持此功能，但是很容易修复
sudo apt-get install build-essential linux-headers-generic
wget https://www.dropbox.com/s/0rmgeve2ibrh1u1/bluetooth-3.16-2.tar.gz
wget https://www.dropbox.com/s/f503f6r686riiow/fw-105b_e065.hcd
tar -zxf bluetooth-3.16-2.tar.gz
cd bluetooth-3.16-2
cp /boot/config-$(uname -r) .config
cp /usr/src/linux-headers-$(uname -r)/Module.symvers Module.symvers
make -C /lib/modules/$(uname -r)/build M=$PWD modules
sudo modprobe -r btusb && sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/
sudo modprobe btusb
然后，我需要查看期望看到的固件文件的名称，因此添加的结果，dmesg | tail -15以便我可以编辑此答案
现在我们知道固件需要被命名什么cd ~和sudo cp fw-105b_e065.hcd /lib/firmware/brcm/BCM43142A0-105b-e065.hcd再
sudo modprobe -r btusb
sudo modprobe btusb
echo btusb | sudo tee -a /etc/modules
而dmesg | tail结果应该改变和蓝牙应能正常工作
内核更新后，蓝牙可能会停止运行，那么您需要
cd bluetooth-3.16-2
make -C /lib/modules/$(uname -r)/build M=$PWD clean
cp /boot/config-$(uname -r) .config
cp /usr/src/linux-headers-$(uname -r)/Module.symvers Module.symvers
make -C /lib/modules/$(uname -r)/build M=$PWD modules
sudo modprobe -r btusb && sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/
sudo modprobe btusb
而且您应该一直等到下一次更新
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我来说两句