我使用 ZorinOS，一个基于 Ubuntu 的操作系统。我已经使用这个蓝牙键盘一段时间了。但是今天早上它突然无缘无故断开连接。之后它一直断开连接。
我尝试使用 grep 来查找日志grep "blue" /var/log/syslog，并得到：
ov 3 00:17:00 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint registered: sender=:1.38 path=/MediaEndpoint/A2DPSink/sbc
Nov 3 00:17:00 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint registered: sender=:1.38 path=/MediaEndpoint/A2DPSource/sbc
Nov 3 00:17:25 lockrr-Lenovo-YOGA-910-13IKB systemd[1]: blueman-mechanism.service: Succeeded.
Nov 2 17:17:48 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint unregistered: sender=:1.38 path=/MediaEndpoint/A2DPSink/sbc
Nov 2 17:17:48 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint unregistered: sender=:1.38 path=/MediaEndpoint/A2DPSource/sbc
Nov 2 17:17:49 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint registered: sender=:1.52 path=/MediaEndpoint/A2DPSink/sbc
Nov 2 17:17:49 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint registered: sender=:1.52 path=/MediaEndpoint/A2DPSource/sbc
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[593]: [system] Activating via systemd: service name='org.blueman.Mechanism' unit='blueman-mechanism.service' requested by ':1.68' (uid=1000 pid=2005 comm="/usr/bin/python3 /usr/bin/blueman-applet " label="unconfined")
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB blueman-mechanism[2118]: Unable to init server: Could not connect: Connection refused
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[1715]: [session uid=1000 pid=1715] Activating via systemd: service name='org.blueman.Applet' unit='blueman-applet.service' requested by ':1.61' (uid=1000 pid=2112 comm="/usr/bin/python3 /usr/bin/blueman-tray " label="unconfined")
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB blueman-mechanism[2118]: Unable to init server: Could not connect: Connection refused
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB blueman-mechani[2118]: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[593]: [system] Successfully activated service 'org.blueman.Mechanism'
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[1715]: [session uid=1000 pid=1715] Successfully activated service 'org.blueman.Applet'
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[1715]: [session uid=1000 pid=1715] Activating via systemd: service name='org.bluez.obex' unit='dbus-org.bluez.obex.service' requested by ':1.52' (uid=1000 pid=2005 comm="/usr/bin/python3 /usr/bin/blueman-applet " label="unconfined")
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[1715]: [session uid=1000 pid=1715] Successfully activated service 'org.bluez.obex'
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB blueman-applet[2124]: blueman-applet version 2.1.2 starting
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB blueman-applet[2124]: There is an instance already running
Nov 2 17:17:52 lockrr-Lenovo-YOGA-910-13IKB systemd[1695]: blueman-applet.service: Succeeded.
Nov 2 17:18:23 lockrr-Lenovo-YOGA-910-13IKB systemd[1]: blueman-mechanism.service: Succeeded.
Nov 2 17:18:40 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[1715]: [session uid=1000 pid=1715] Activating service name='ca.desrt.dconf' requested by ':1.52' (uid=1000 pid=2005 comm="/usr/bin/python3 /usr/bin/blueman-applet " label="unconfined")
Nov 2 17:18:42 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Can't get HIDP connection info
Nov 2 17:18:44 lockrr-Lenovo-YOGA-910-13IKB kernel: [ 112.441148] input: Logitech Keyboard K480 Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/bluetooth/hci0/hci0:2/0005:046D:B330.0006/input/input29
Nov 2 17:18:44 lockrr-Lenovo-YOGA-910-13IKB upowerd[1878]: treating change event as add on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/bluetooth/hci0/hci0:2/0005:046D:B330.0006/power_supply/hid-34:88:5d:39:97:f5-battery
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Terminating
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint unregistered: sender=:1.52 path=/MediaEndpoint/A2DPSink/sbc
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Endpoint unregistered: sender=:1.52 path=/MediaEndpoint/A2DPSource/sbc
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Stopping SDP server
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[590]: Exit
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB systemd[1]: bluetooth.service: Succeeded.
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: Bluetooth daemon 5.53
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: Starting SDP server
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[593]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.178' (uid=0 pid=6506 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: Bluetooth management interface 1.21 initialized
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: Endpoint registered: sender=:1.52 path=/MediaEndpoint/A2DPSink/sbc
Nov 2 18:15:59 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: Endpoint registered: sender=:1.52 path=/MediaEndpoint/A2DPSource/sbc
Nov 2 18:16:01 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[593]: [system] Activating via systemd: service name='org.blueman.Mechanism' unit='blueman-mechanism.service' requested by ':1.68' (uid=1000 pid=2005 comm="/usr/bin/python3 /usr/bin/blueman-applet " label="unconfined")
Nov 2 18:16:01 lockrr-Lenovo-YOGA-910-13IKB blueman-mechanism[6513]: Unable to init server: Could not connect: Connection refused
Nov 2 18:16:01 lockrr-Lenovo-YOGA-910-13IKB blueman-mechanism[6513]: Unable to init server: Could not connect: Connection refused
Nov 2 18:16:01 lockrr-Lenovo-YOGA-910-13IKB blueman-mechani[6513]: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
Nov 2 18:16:01 lockrr-Lenovo-YOGA-910-13IKB dbus-daemon[593]: [system] Successfully activated service 'org.blueman.Mechanism'
Nov 2 18:16:31 lockrr-Lenovo-YOGA-910-13IKB systemd[1]: blueman-mechanism.service: Succeeded.
Nov 2 18:18:26 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:19:57 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: connect error: Operation already in progress (114)
Nov 2 18:20:05 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: connect error: Host is down (112)
Nov 2 18:24:31 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:26:36 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:28:42 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:30:47 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:32:52 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:34:57 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:37:03 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:39:08 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:41:13 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:43:18 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:45:24 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
Nov 2 18:47:29 lockrr-Lenovo-YOGA-910-13IKB bluetoothd[6506]: BT socket not connected
看起来好像是 bt 插座断开了，但我不知道为什么。
我连接上它，用了一段时间，它还是会断开连接。一开始，我以为是键盘电池电量不足，但更换后，它仍然会断开连接。问题是，这台笔记本电脑很旧了，而且我的 BIOS 已经出现了一些问题，比如它无法测量电池电量。我猜蓝牙问题是由 BIOS 引起的（？）。如何知道问题是笔记本电脑引起的还是键盘本身坏了？