我有一台装有 Ubuntu 20.04 的联想 Thinkpad T460p。昨天一切正常，但今天蓝牙停止工作了。我甚至没有关机。据我记得没有系统更新。
$ blueman-manager
blueman-manager version 2.1.2 starting
blueman-manager 09.01.28 ERROR Manager:118 on_dbus_name_appeared: Default adapter not found, trying first available.
blueman-manager 09.01.28 ERROR Manager:122 on_dbus_name_appeared: No adapter(s) found, exiting
$ hcitool scan
Device is not available: No such device
$ sudo dmidecode -s bios-version
R07ET63W (2.03 )
$ sudo dmidecode -s bios-release-date
03/15/2016
$ dmesg | grep -i blue
[ 3.091649] Bluetooth: Core ver 2.22
[ 3.091666] Bluetooth: HCI device and connection manager initialized
[ 3.091669] Bluetooth: HCI socket layer initialized
[ 3.091671] Bluetooth: L2CAP socket layer initialized
[ 3.091674] Bluetooth: SCO socket layer initialized
[ 3.136626] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
[ 3.140252] Bluetooth: hci0: Bootloader revision 0.0 build 2 week 52 2014
[ 3.149664] Bluetooth: hci0: Device revision is 5
[ 3.149665] Bluetooth: hci0: Secure boot is enabled
[ 3.149665] Bluetooth: hci0: OTP lock is enabled
[ 3.149666] Bluetooth: hci0: API lock is enabled
[ 3.149667] Bluetooth: hci0: Debug lock is disabled
[ 3.149668] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 3.153992] Bluetooth: hci0: Found device firmware: intel/ibt-11-5.sfi
[ 4.224885] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 4.224886] Bluetooth: BNEP filters: protocol multicast
[ 4.224889] Bluetooth: BNEP socket layer initialized
[ 4.664148] Bluetooth: hci0: Failed to send firmware data (-38)
芯片坏了吗？我能确认一下吗？
编辑：我刚刚找到了一个 USB 蓝牙适配器。当我插入它时，它又可以正常工作了。所以我猜一定是硬件的一部分坏了？
答案1
我刚刚想起来，可能是某个奇怪的 Fn 键组合禁用了蓝牙。我检查了一下，在蓝牙坏了之后意外启用了飞行模式。然后我重新打开了 Wifi + 蓝牙，它又恢复了。我不知道发生了什么，但我猜蓝牙刚刚被软件禁用。