蓝牙关闭，即使“打开”
我有一台 Thinkpad X1 Carbon 7th Gen，运行 Fedora 30。我的问题是我无法让蓝牙工作。我尝试了多种方法来解决这个问题，但都没有效果。
- 通过设置 GUI
当我转到“设置/蓝牙”时，我可以打开蓝牙（右上角的拨动开关）。但是，文本不会改变并告诉我蓝牙已关闭。
iwlwifi.conf
当然，我已经在BIOS中检查了蓝牙是否已激活。此外，我创建/etc/modprobe.d/iwlwifi.conf如下：
options iwlwifi bt_coex_active=0
- TLP
最后，我设置/etc/default/tlp为（仅相关摘录）：
[…]
# Restore radio device state (Bluetooth, WiFi, WWAN) from previous shutdown
# on system startup: 0=disable, 1=enable.
# Note: the parameters DEVICES_TO_DISABLE/ENABLE_ON_STARTUP/SHUTDOWN below
# are ignored when this is enabled.
# Default: 0
RESTORE_DEVICE_STATE_ON_STARTUP=0
# Radio devices to disable on startup: bluetooth, wifi, wwan.
# Separate multiple devices with spaces.
# Default: <none>
#DEVICES_TO_DISABLE_ON_STARTUP="bluetooth"
# Radio devices to enable on startup: bluetooth, wifi, wwan.
# Separate multiple devices with spaces.
# Default: <none>
DEVICES_TO_ENABLE_ON_STARTUP="wifi bluetooth"
# Radio devices to disable on shutdown: bluetooth, wifi, wwan.
# (workaround for devices that are blocking shutdown).
# Default: <none>
DEVICES_TO_DISABLE_ON_SHUTDOWN="bluetooth wifi wwan"
# Radio devices to enable on shutdown: bluetooth, wifi, wwan.
# (to prevent other operating systems from missing radios).
# Default: <none>
#DEVICES_TO_ENABLE_ON_SHUTDOWN="wwan"
# Radio devices to enable on AC: bluetooth, wifi, wwan.
# Default: <none>
#DEVICES_TO_ENABLE_ON_AC="bluetooth wifi wwan"
# Radio devices to disable on battery: bluetooth, wifi, wwan.
# Default: <none>
#DEVICES_TO_DISABLE_ON_BAT="bluetooth wifi wwan"
# Radio devices to disable on battery when not in use (not connected):
# bluetooth, wifi, wwan.
# Default: <none>
#DEVICES_TO_DISABLE_ON_BAT_NOT_IN_USE="bluetooth wifi wwan"
[…]
# ------------------------------------------------------------------------------
# tlp-rdw - Parameters for the radio device wizard
# Possible devices: bluetooth, wifi, wwan.
# Notes:
# - Parameters are disabled by default, remove the leading # to enable them
# - Separate multiple radio devices with spaces
# Default: <none> (for all parameters below)
# Radio devices to disable on connect.
DEVICES_TO_DISABLE_ON_LAN_CONNECT="wifi wwan"
#DEVICES_TO_DISABLE_ON_WIFI_CONNECT="wwan"
#DEVICES_TO_DISABLE_ON_WWAN_CONNECT="wifi"
# Radio devices to enable on disconnect.
DEVICES_TO_ENABLE_ON_LAN_DISCONNECT="wifi "
#DEVICES_TO_ENABLE_ON_WIFI_DISCONNECT=""
#DEVICES_TO_ENABLE_ON_WWAN_DISCONNECT=""
# Radio devices to enable/disable when docked.
#DEVICES_TO_ENABLE_ON_DOCK=""
#DEVICES_TO_DISABLE_ON_DOCK=""
# Radio devices to enable/disable when undocked.
#DEVICES_TO_ENABLE_ON_UNDOCK="wifi"
#DEVICES_TO_DISABLE_ON_UNDOCK=""
- 人机交互配置
我还尝试禁用蓝牙的电源优化，但在我想切换时powertop尝试运行>> /usr/sbin/hciconfig hci0 up &> /dev/null &
options iwlwifi bt_coex_active=0
当我运行 Fedora (?) 时，我有bin而不是sbin，所以我sudo /usr/bin/hciconfig hci0 up &> /dev/null手动运行。
- 通过 CLI 打开蓝牙
[…]
# Restore radio device state (Bluetooth, WiFi, WWAN) from previous shutdown
# on system startup: 0=disable, 1=enable.
# Note: the parameters DEVICES_TO_DISABLE/ENABLE_ON_STARTUP/SHUTDOWN below
# are ignored when this is enabled.
# Default: 0
RESTORE_DEVICE_STATE_ON_STARTUP=0
# Radio devices to disable on startup: bluetooth, wifi, wwan.
# Separate multiple devices with spaces.
# Default: <none>
#DEVICES_TO_DISABLE_ON_STARTUP="bluetooth"
# Radio devices to enable on startup: bluetooth, wifi, wwan.
# Separate multiple devices with spaces.
# Default: <none>
DEVICES_TO_ENABLE_ON_STARTUP="wifi bluetooth"
# Radio devices to disable on shutdown: bluetooth, wifi, wwan.
# (workaround for devices that are blocking shutdown).
# Default: <none>
DEVICES_TO_DISABLE_ON_SHUTDOWN="bluetooth wifi wwan"
# Radio devices to enable on shutdown: bluetooth, wifi, wwan.
# (to prevent other operating systems from missing radios).
# Default: <none>
#DEVICES_TO_ENABLE_ON_SHUTDOWN="wwan"
# Radio devices to enable on AC: bluetooth, wifi, wwan.
# Default: <none>
#DEVICES_TO_ENABLE_ON_AC="bluetooth wifi wwan"
# Radio devices to disable on battery: bluetooth, wifi, wwan.
# Default: <none>
#DEVICES_TO_DISABLE_ON_BAT="bluetooth wifi wwan"
# Radio devices to disable on battery when not in use (not connected):
# bluetooth, wifi, wwan.
# Default: <none>
#DEVICES_TO_DISABLE_ON_BAT_NOT_IN_USE="bluetooth wifi wwan"
[…]
# ------------------------------------------------------------------------------
# tlp-rdw - Parameters for the radio device wizard
# Possible devices: bluetooth, wifi, wwan.
# Notes:
# - Parameters are disabled by default, remove the leading # to enable them
# - Separate multiple radio devices with spaces
# Default: <none> (for all parameters below)
# Radio devices to disable on connect.
DEVICES_TO_DISABLE_ON_LAN_CONNECT="wifi wwan"
#DEVICES_TO_DISABLE_ON_WIFI_CONNECT="wwan"
#DEVICES_TO_DISABLE_ON_WWAN_CONNECT="wifi"
# Radio devices to enable on disconnect.
DEVICES_TO_ENABLE_ON_LAN_DISCONNECT="wifi "
#DEVICES_TO_ENABLE_ON_WIFI_DISCONNECT=""
#DEVICES_TO_ENABLE_ON_WWAN_DISCONNECT=""
# Radio devices to enable/disable when docked.
#DEVICES_TO_ENABLE_ON_DOCK=""
#DEVICES_TO_DISABLE_ON_DOCK=""
# Radio devices to enable/disable when undocked.
#DEVICES_TO_ENABLE_ON_UNDOCK="wifi"
#DEVICES_TO_DISABLE_ON_UNDOCK=""
- 检查
rfkill状态
似乎不是这里的问题。
>> Good Bluetooth device interface status
- 通过调查
dmesg我已经使用# comments. 请注意，当我打开计算机并进入左上角菜单时，我可以“关闭”蓝牙……哪个状态是“关闭”！
$ sudo hciconfig up
hci0: Type: Primary Bus: USB
BD Address: DC:71:96:99:3F:A8 ACL MTU: 1021:4 SCO MTU: 96:6
DOWN
RX bytes:16660 acl:0 sco:0 events:2700 errors:0
TX bytes:666973 acl:0 sco:0 commands:2698 errors:0
所有这一切都没有效果。
? 如何让蓝牙真正工作？
好吧，我觉得有点愚蠢，但是\xe2\x80\xa6蓝牙守护程序根本没有运行！
\n\n所以我通过以下方式解决了这个问题：
\n\nsystemctl enable bluetooth\n瞧\xc3\xa0！
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