我正在运行一台运行 15.04 版的新型 Broadwell NUC。过去几周蓝牙一直“正常”（除了用蓝牙鼠标测试外，没有使用过）。昨天我开始看到 syslog 和 dmesg 中出现连续不断的垃圾邮件。到目前为止，我发现的唯一解决方法是将其列入黑名单btusb然后/etc/modules/blacklist.conf重新启动。
这些消息是在机器无人看管时开始出现的，udev 和内核的最后一次更新是在几天前。我尝试过冷重启，然后使用较旧的内核，拔掉其他所有 USB 设备，打开/关闭安全启动——什么都没有。hci0 sending initial HCI reset command failed (-19)内核中的行似乎是关键，但我不知道 -19 是什么意思，也不知道在哪里查找它。我在哪里可以找到更多信息，或者我在日志中遗漏了相关内容？
之后立即发送 dmesg spam sudo modprobe btusb:
[ +0.000001] Bluetooth: HCI device and connection manager initialized
[ +0.000004] Bluetooth: HCI socket layer initialized
[ +0.000002] Bluetooth: L2CAP socket layer initialized
[ +0.000004] Bluetooth: SCO socket layer initialized
[ +0.003016] usbcore: registered new interface driver btusb
[ +0.024109] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ +0.000003] Bluetooth: BNEP filters: protocol multicast
[ +0.000004] Bluetooth: BNEP socket layer initialized
[ +1.713419] usb 1-7: USB disconnect, device number 13
[ +0.000275] Bluetooth: hci0 sending initial HCI reset command failed (-19)
[ +0.272765] usb 1-7: new full-speed USB device number 15 using xhci_hcd
[ +0.128553] usb 1-7: No LPM exit latency info found, disabling LPM.
[ +0.000875] usb 1-7: New USB device found, idVendor=8087, idProduct=0a2a
[ +0.000004] usb 1-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ +1.745806] usb 1-7: USB disconnect, device number 15
[ +0.000190] Bluetooth: hci0 sending initial HCI reset command failed (-19)
[ +0.273130] usb 1-7: new full-speed USB device number 16 using xhci_hcd
[ +0.128570] usb 1-7: No LPM exit latency info found, disabling LPM.
[ +0.000934] usb 1-7: New USB device found, idVendor=8087, idProduct=0a2a
[ +0.000004] usb 1-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ +1.738841] usb 1-7: USB disconnect, device number 16
udev_log="debug"设置后的 syslog spam /etc/udev/udev.conf:
Apr 18 11:22:05 nuc kernel: [ 1029.613724] usb 1-7: new full-speed USB device number 100 using xhci_hcd
Apr 18 11:22:05 nuc systemd-udevd[259]: seq 4855 queued, 'add' 'usb'
Apr 18 11:22:05 nuc systemd-udevd[259]: passed 276 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4855 running
Apr 18 11:22:05 nuc systemd-udevd[2370]: no db file to read /run/udev/data/c189:99: No such file or directory
Apr 18 11:22:05 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:05 nuc systemd-udevd[2370]: IMPORT builtin 'usb_id' /lib/udev/rules.d/40-libgphoto2-6.rules:11
Apr 18 11:22:05 nuc systemd-udevd[259]: seq 4856 queued, 'add' 'usb'
Apr 18 11:22:05 nuc systemd-udevd[259]: seq 4857 queued, 'add' 'bluetooth'
Apr 18 11:22:05 nuc systemd-udevd[259]: seq 4858 queued, 'add' 'rfkill'
Apr 18 11:22:05 nuc systemd-udevd[259]: seq 4859 queued, 'add' 'usb'
Apr 18 11:22:05 nuc systemd-udevd[2370]: IMPORT builtin skip 'usb_id' /lib/udev/rules.d/50-udev-default.rules:9
Apr 18 11:22:05 nuc systemd-udevd[2370]: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:9
Apr 18 11:22:05 nuc kernel: [ 1029.742320] usb 1-7: No LPM exit latency info found, disabling LPM.
Apr 18 11:22:05 nuc kernel: [ 1029.743246] usb 1-7: New USB device found, idVendor=8087, idProduct=0a2a
Apr 18 11:22:05 nuc kernel: [ 1029.743251] usb 1-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Apr 18 11:22:05 nuc systemd-udevd[2370]: MODE 0664 /lib/udev/rules.d/50-udev-default.rules:41
Apr 18 11:22:05 nuc systemd-udevd[2370]: handling device node '/dev/bus/usb/001/100', devnum=c189:99, mode=0664, uid=0, gid=0
Apr 18 11:22:05 nuc systemd-udevd[2370]: set permissions /dev/bus/usb/001/100, 020664, uid=0, gid=0
Apr 18 11:22:05 nuc systemd-udevd[2370]: creating symlink '/dev/char/189:99' to '../bus/usb/001/100'
Apr 18 11:22:05 nuc systemd-udevd[2370]: created db file '/run/udev/data/c189:99' for '/devices/pci0000:00/0000:00:14.0/usb1/1-7'
Apr 18 11:22:05 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4855 processed with 0
Apr 18 11:22:05 nuc systemd-udevd[259]: passed 294 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:05 nuc systemd-udevd[259]: passed 307 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:05 nuc systemd-udevd[2371]: seq 4859 running
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4856 running
Apr 18 11:22:05 nuc systemd-udevd[2371]: no db file to read /run/udev/data/+usb:1-7:1.1: No such file or directory
Apr 18 11:22:05 nuc systemd-udevd[2370]: no db file to read /run/udev/data/+usb:1-7:1.0: No such file or directory
Apr 18 11:22:05 nuc systemd-udevd[2371]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:05 nuc systemd-udevd[2371]: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:11
Apr 18 11:22:05 nuc systemd-udevd[2371]: RUN 'kmod load $env{MODALIAS}' /lib/udev/rules.d/80-drivers.rules:5
Apr 18 11:22:05 nuc systemd-udevd[2371]: created db file '/run/udev/data/+usb:1-7:1.1' for '/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.1'
Apr 18 11:22:05 nuc systemd-udevd[2371]: Execute 'load' 'usb:v8087p0A2Ad0001dcE0dsc01dp01icE0isc01ip01in01'
Apr 18 11:22:05 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:05 nuc systemd-udevd[2371]: Inserted 'btusb'
Apr 18 11:22:05 nuc systemd-udevd[2371]: passed unknown number of bytes to netlink monitor 0x7fd5f3383470
Apr 18 11:22:05 nuc systemd-udevd[2371]: seq 4859 processed with 0
Apr 18 11:22:05 nuc systemd-udevd[2370]: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:11
Apr 18 11:22:05 nuc systemd-udevd[2370]: RUN 'kmod load $env{MODALIAS}' /lib/udev/rules.d/80-drivers.rules:5
Apr 18 11:22:05 nuc systemd-udevd[2370]: created db file '/run/udev/data/+usb:1-7:1.0' for '/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0'
Apr 18 11:22:05 nuc systemd-udevd[2370]: Execute 'load' 'usb:v8087p0A2Ad0001dcE0dsc01dp01icE0isc01ip01in00'
Apr 18 11:22:05 nuc systemd-udevd[2370]: Inserted 'btusb'
Apr 18 11:22:05 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4856 processed with 0
Apr 18 11:22:05 nuc systemd-udevd[259]: passed 197 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4857 running
Apr 18 11:22:05 nuc systemd-udevd[2370]: no db file to read /run/udev/data/+bluetooth:hci0: No such file or directory
Apr 18 11:22:05 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:05 nuc systemd-udevd[2370]: created db file '/run/udev/data/+bluetooth:hci0' for '/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0'
Apr 18 11:22:05 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:05 nuc systemd-udevd[259]: passed 245 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4857 processed with 0
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4858 running
Apr 18 11:22:05 nuc systemd-udevd[2370]: no db file to read /run/udev/data/+rfkill:rfkill204: No such file or directory
Apr 18 11:22:05 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:05 nuc systemd[1544]: sys-subsystem-bluetooth-devices-hci0.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd[1]: Got disconnect on private connection.
Apr 18 11:22:05 nuc systemd[1]: sys-subsystem-bluetooth-devices-hci0.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd-udevd[2370]: IMPORT builtin 'path_id' /lib/udev/rules.d/99-systemd.rules:13
Apr 18 11:22:05 nuc systemd[1544]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd[1]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd-udevd[2370]: created db file '/run/udev/data/+rfkill:rfkill204' for '/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0/rfkill204'
Apr 18 11:22:05 nuc systemd[1]: Trying to enqueue job bluetooth.target/start/fail
Apr 18 11:22:05 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:05 nuc systemd[1]: Installed new job bluetooth.target/start as 24475
Apr 18 11:22:05 nuc systemd-udevd[2370]: seq 4858 processed with 0
Apr 18 11:22:05 nuc systemd[1]: Enqueued job bluetooth.target/start as 24475
Apr 18 11:22:05 nuc systemd[1544]: sys-subsystem-rfkill-devices-rfkill204.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitNew cookie=6735 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1544]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0-rfkill204.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitNew cookie=6736 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitNew cookie=6737 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobNew cookie=6738 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: sys-subsystem-rfkill-devices-rfkill204.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd[1]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0-rfkill204.device changed dead -> plugged
Apr 18 11:22:05 nuc systemd[1]: Trying to enqueue job [email protected]/start/fail
Apr 18 11:22:05 nuc systemd[1]: Installed new job [email protected]/start as 24574
Apr 18 11:22:05 nuc systemd[1]: Enqueued job [email protected]/start as 24574
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitNew cookie=6739 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitNew cookie=6740 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitNew cookie=6741 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobNew cookie=6742 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: About to execute: /lib/systemd/systemd-rfkill load rfkill204
Apr 18 11:22:05 nuc systemd[1]: Forked /lib/systemd/systemd-rfkill as 5600
Apr 18 11:22:05 nuc systemd[1]: [email protected] changed dead -> start
Apr 18 11:22:05 nuc systemd[1]: Starting Load/Save RF Kill Switch Status of rfkill204...
Apr 18 11:22:05 nuc systemd[1]: bluetooth.target changed dead -> active
Apr 18 11:22:05 nuc systemd[1]: Job bluetooth.target/start finished, result=done
Apr 18 11:22:05 nuc systemd[1]: Reached target Bluetooth.
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobRemoved cookie=6743 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Starting Bluetooth.
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/bluetooth_2etarget interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6744 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/systemd_2drfkill_40rfkill204_2eservice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6745 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/systemd_2drfkill_40rfkill204_2eservice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6746 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/job/24574 interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6747 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[5600]: Executing: /lib/systemd/systemd-rfkill load rfkill204
Apr 18 11:22:05 nuc systemd-rfkill[5600]: Operating on rfkill device 'hci0'.
Apr 18 11:22:05 nuc systemd[1]: Received SIGCHLD from PID 5600 (systemd-rfkill).
Apr 18 11:22:05 nuc systemd[1]: Child 5600 (systemd-rfkill) died (code=exited, status=0/SUCCESS)
Apr 18 11:22:05 nuc systemd[1]: Child 5600 belongs to [email protected]
Apr 18 11:22:05 nuc systemd[1]: [email protected]: main process exited, code=exited, status=0/SUCCESS
Apr 18 11:22:05 nuc systemd[1]: [email protected] changed start -> exited
Apr 18 11:22:05 nuc systemd[1]: Job [email protected]/start finished, result=done
Apr 18 11:22:05 nuc systemd[1]: Started Load/Save RF Kill Switch Status of rfkill204.
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobRemoved cookie=6748 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: [email protected]: cgroup is empty
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/systemd_2drfkill_40rfkill204_2eservice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6749 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/systemd_2drfkill_40rfkill204_2eservice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6750 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Accepted new private connection.
Apr 18 11:22:05 nuc systemd[1]: Got message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/agent interface=org.freedesktop.systemd1.Agent member=Released cookie=1 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/agent interface=org.freedesktop.systemd1.Agent member=Released cookie=1 reply_cookie=0 error=n/a
Apr 18 11:22:05 nuc systemd[1]: Got disconnect on private connection.
Apr 18 11:22:05 nuc colord[1063]: (colord:1063): GLib-CRITICAL **: g_variant_new_string: assertion 'g_utf8_validate (string, -1, NULL)' failed
Apr 18 11:22:05 nuc colord[1063]: unable to receive message
Apr 18 11:22:06 nuc systemd[1]: Got message type=signal sender=org.freedesktop.DBus destination=n/a object=/org/freedesktop/DBus interface=org.freedesktop.DBus member=NameOwnerChanged cookie=768 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc kernel: [ 1031.482014] usb 1-7: USB disconnect, device number 100
Apr 18 11:22:07 nuc kernel: [ 1031.482224] Bluetooth: hci0 sending initial HCI reset command failed (-19)
Apr 18 11:22:07 nuc systemd-udevd[259]: Validate module index
Apr 18 11:22:07 nuc systemd-udevd[259]: Check if link configuration needs reloading.
Apr 18 11:22:07 nuc systemd-udevd[259]: seq 4860 queued, 'remove' 'rfkill'
Apr 18 11:22:07 nuc systemd-udevd[259]: passed 248 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:07 nuc systemd-udevd[259]: seq 4861 queued, 'remove' 'bluetooth'
Apr 18 11:22:07 nuc systemd-udevd[259]: seq 4862 queued, 'remove' 'usb'
Apr 18 11:22:07 nuc systemd-udevd[259]: seq 4863 queued, 'remove' 'usb'
Apr 18 11:22:07 nuc systemd-udevd[259]: passed 297 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:07 nuc systemd-udevd[2371]: seq 4863 running
Apr 18 11:22:07 nuc systemd-udevd[259]: seq 4864 queued, 'remove' 'usb'
Apr 18 11:22:07 nuc systemd-udevd[2371]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:07 nuc systemd-udevd[2371]: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:11
Apr 18 11:22:07 nuc systemd-udevd[2371]: passed unknown number of bytes to netlink monitor 0x7fd5f3383470
Apr 18 11:22:07 nuc systemd-udevd[2371]: seq 4863 processed with 0
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4860 running
Apr 18 11:22:07 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:07 nuc systemd[1544]: sys-subsystem-rfkill-devices-rfkill204.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd[1544]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0-rfkill204.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4860 processed with 0
Apr 18 11:22:07 nuc systemd[1]: sys-subsystem-rfkill-devices-rfkill204.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd-udevd[259]: passed 200 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4861 running
Apr 18 11:22:07 nuc systemd[1]: Trying to enqueue job [email protected]/stop/replace
Apr 18 11:22:07 nuc systemd[1544]: Collecting sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0-rfkill204.device
Apr 18 11:22:07 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:07 nuc systemd[1]: Installed new job [email protected]/stop as 24586
Apr 18 11:22:07 nuc systemd[1544]: Collecting sys-subsystem-rfkill-devices-rfkill204.device
Apr 18 11:22:07 nuc systemd[1]: Enqueued job [email protected]/stop as 24586
Apr 18 11:22:07 nuc systemd[1]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0-rfkill204.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd[1544]: sys-subsystem-bluetooth-devices-hci0.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:07 nuc systemd[1]: Collecting sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0-rfkill204.device
Apr 18 11:22:07 nuc systemd[1544]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd-udevd[259]: passed 297 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4861 processed with 0
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitRemoved cookie=6751 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1544]: Collecting sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0.device
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4862 running
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/sys_2dsubsystem_2drfkill_2ddevices_2drfkill204_2edevice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6752 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1544]: Collecting sys-subsystem-bluetooth-devices-hci0.device
Apr 18 11:22:07 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/sys_2dsubsystem_2drfkill_2ddevices_2drfkill204_2edevice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6753 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd-udevd[2370]: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:11
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobNew cookie=6754 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:07 nuc systemd[1]: sys-subsystem-bluetooth-devices-hci0.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4862 processed with 0
Apr 18 11:22:07 nuc systemd-udevd[259]: passed 279 bytes to netlink monitor 0x7fd5f33770d0
Apr 18 11:22:07 nuc systemd[1]: sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0.device changed plugged -> dead
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4864 running
Apr 18 11:22:07 nuc systemd[1]: Unit bluetooth.target is not needed anymore. Stopping.
Apr 18 11:22:07 nuc systemd-udevd[2370]: value '[dmi/id]sys_vendor' is '���������������������������������'
Apr 18 11:22:07 nuc systemd[1]: Trying to enqueue job bluetooth.target/stop/fail
Apr 18 11:22:07 nuc systemd-udevd[2370]: IMPORT builtin 'usb_id' /lib/udev/rules.d/50-udev-default.rules:9
Apr 18 11:22:07 nuc systemd[1]: Installed new job bluetooth.target/stop as 24587
Apr 18 11:22:07 nuc systemd-udevd[2370]: No USB vendor information available
Apr 18 11:22:07 nuc systemd[1]: Enqueued job bluetooth.target/stop as 24587
Apr 18 11:22:07 nuc systemd-udevd[2370]: IMPORT builtin 'usb_id' returned non-zero
Apr 18 11:22:07 nuc systemd[1]: Collecting sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-bluetooth-hci0.device
Apr 18 11:22:07 nuc systemd-udevd[2370]: passed unknown number of bytes to netlink monitor 0x7fd5f338db10
Apr 18 11:22:07 nuc systemd[1]: Collecting sys-subsystem-bluetooth-devices-hci0.device
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitRemoved cookie=6755 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd-udevd[2370]: seq 4864 processed with 0
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitRemoved cookie=6756 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobNew cookie=6757 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: bluetooth.target changed active -> dead
Apr 18 11:22:07 nuc systemd[1]: Job bluetooth.target/stop finished, result=done
Apr 18 11:22:07 nuc systemd[1]: Stopped target Bluetooth.
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobRemoved cookie=6758 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Stopping Bluetooth.
Apr 18 11:22:07 nuc systemd[1]: About to execute: /lib/systemd/systemd-rfkill save rfkill204
Apr 18 11:22:07 nuc systemd[1]: Forked /lib/systemd/systemd-rfkill as 5602
Apr 18 11:22:07 nuc systemd[1]: [email protected] changed exited -> stop
Apr 18 11:22:07 nuc systemd[1]: Stopping Load/Save RF Kill Switch Status of rfkill204...
Apr 18 11:22:07 nuc systemd[1]: Collecting bluetooth.target
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitRemoved cookie=6759 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/systemd_2drfkill_40rfkill204_2eservice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6760 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/unit/systemd_2drfkill_40rfkill204_2eservice interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6761 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/job/24586 interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=6762 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[5602]: Executing: /lib/systemd/systemd-rfkill save rfkill204
Apr 18 11:22:07 nuc systemd-rfkill[5602]: Failed to get rfkill device 'rfkill204', ignoring: No such file or directory
Apr 18 11:22:07 nuc systemd[1]: Received SIGCHLD from PID 5602 (systemd-rfkill).
Apr 18 11:22:07 nuc systemd[1]: Child 5602 (systemd-rfkill) died (code=exited, status=0/SUCCESS)
Apr 18 11:22:07 nuc systemd[1]: Child 5602 belongs to [email protected]
Apr 18 11:22:07 nuc systemd[1]: [email protected]: control process exited, code=exited status=0
Apr 18 11:22:07 nuc systemd[1]: [email protected] got final SIGCHLD for state stop
Apr 18 11:22:07 nuc systemd[1]: [email protected] changed stop -> dead
Apr 18 11:22:07 nuc systemd[1]: Job [email protected]/stop finished, result=done
Apr 18 11:22:07 nuc systemd[1]: Stopped Load/Save RF Kill Switch Status of rfkill204.
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobRemoved cookie=6763 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: [email protected]: cgroup is empty
Apr 18 11:22:07 nuc systemd[1]: Collecting [email protected]
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitRemoved cookie=6764 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Collecting sys-subsystem-rfkill-devices-rfkill204.device
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=UnitRemoved cookie=6765 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Accepted new private connection.
Apr 18 11:22:07 nuc systemd-udevd[259]: error opening USB device 'descriptors' file
Apr 18 11:22:07 nuc systemd[1]: Accepted new private connection.
Apr 18 11:22:07 nuc systemd[1]: Got message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/agent interface=org.freedesktop.systemd1.Agent member=Released cookie=1 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/agent interface=org.freedesktop.systemd1.Agent member=Released cookie=1 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Got message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/agent interface=org.freedesktop.systemd1.Agent member=Released cookie=1 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Sent message type=signal sender=n/a destination=n/a object=/org/freedesktop/systemd1/agent interface=org.freedesktop.systemd1.Agent member=Released cookie=1 reply_cookie=0 error=n/a
Apr 18 11:22:07 nuc systemd[1]: Got disconnect on private connection.
usb：1-7 确实是英特尔蓝牙设备：
$ udevadm info --query=all /sys/bus/usb/devices/1-7:1.0
calling: info
P: /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0
E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0
E: DEVTYPE=usb_interface
E: DRIVER=btusb
E: ID_USB_CLASS_FROM_DATABASE=Wireless
E: ID_USB_PROTOCOL_FROM_DATABASE=Bluetooth
E: ID_USB_SUBCLASS_FROM_DATABASE=Radio Frequency
E: ID_VENDOR_FROM_DATABASE=Intel Corp.
E: INTERFACE=224/1/1
E: MODALIAS=usb:v8087p0A2Ad0001dcE0dsc01dp01icE0isc01ip01in00
E: PRODUCT=8087/a2a/1
答案1
我知道这是一个古老的话题，但是为了那些分享这种持续到今天的挫败感的人，我会重新提起它……
请参阅英特尔网站上的此主题： https://communities.intel.com/message/311296?tstart=0#311296
显然，关闭并拔下 NUC 几分钟即可解决问题。（永远？）我希望这会有所帮助。
富有的