我将我的 Linux 笔记本电脑打开，盖子打开，同时它使用电池供电几分钟，然后它进入“睡眠”状态（根据 systemd 日志） - 我认为这意味着与休眠相同？
但是我的笔记本电脑，无论出于何种原因，都无法从睡眠/休眠状态恢复，因此它只是从头开始启动，我将丢失所有未保存的工作（幸运的是，我没有任何未保存的工作）。
我进入 KDE 系统设置尝试对此进行配置，但它（在 KDE 中）配置为休眠的唯一时间是当电池电量处于“临界”状态时，而电池电量又被配置为 5% 或更低。但电池电量远未低至 5%。
如果我跑
journalctl -x --since="2016-06-19 08:00:00" --until="2016-06-19 08:15:00"
要了解当时发生的事情，没有什么可看的：
Jun 19 08:04:26 localhost.localdomain audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=dnf-makecache comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr
Jun 19 08:11:04 localhost.localdomain NetworkManager[1113]: <info> sleep requested (sleeping: no enabled: yes)
Jun 19 08:11:04 localhost.localdomain NetworkManager[1113]: <info> sleeping...
Jun 19 08:11:04 localhost.localdomain audit: NETFILTER_CFG table=nat family=10 entries=52
Jun 19 08:11:04 localhost.localdomain NetworkManager[1113]: <info> (wlp2s0): device state change: activated -> unmanaged (reason 'sleeping') [100 10 37]
Jun 19 08:11:04 localhost.localdomain audit: NETFILTER_CFG table=mangle family=10 entries=40
Jun 19 08:11:04 localhost.localdomain audit: NETFILTER_CFG table=filter family=10 entries=83
Jun 19 08:11:04 localhost.localdomain audit: NETFILTER_CFG table=nat family=2 entries=58
Jun 19 08:11:04 localhost.localdomain audit: NETFILTER_CFG table=mangle family=2 entries=40
Jun 19 08:11:04 localhost.localdomain audit: NETFILTER_CFG table=filter family=2 entries=92
Jun 19 08:11:04 localhost.localdomain NetworkManager[1113]: <info> (wlp2s0): canceled DHCP transaction, DHCP client pid 2065
Jun 19 08:11:04 localhost.localdomain NetworkManager[1113]: <info> (wlp2s0): DHCPv4 state changed bound -> done
Jun 19 08:11:04 localhost.localdomain avahi-daemon[918]: Withdrawing address record for 192.168.1.101 on wlp2s0.
Jun 19 08:11:04 localhost.localdomain avahi-daemon[918]: Leaving mDNS multicast group on interface wlp2s0.IPv4 with address 192.168.1.101.
Jun 19 08:11:04 localhost.localdomain kernel: brcmfmac: brcmf_inetaddr_changed: fail to get arp ip table err:-23
Jun 19 08:11:04 localhost.localdomain avahi-daemon[918]: Interface wlp2s0.IPv4 no longer relevant for mDNS.
Jun 19 08:11:04 localhost.localdomain kernel: brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code
Jun 19 08:11:04 localhost.localdomain avahi-daemon[918]: Withdrawing address record for fe80::290:4cff:fe0d:f43e on wlp2s0.
Jun 19 08:11:04 localhost.localdomain NetworkManager[1113]: <info> NetworkManager state is now ASLEEP
Jun 19 08:11:05 localhost.localdomain NetworkManager[1113]: <warn> Failed to GDBus.Error:fi.w1.wpa_supplicant1.NotConnected: This interface is not connected: disconnect.
Jun 19 08:11:05 localhost.localdomain dbus[943]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Jun 19 08:11:05 localhost.localdomain systemd[1]: Reached target Sleep.
-- Subject: Unit sleep.target has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit sleep.target has finished starting up.
--
-- The start-up result is done.
Jun 19 08:11:05 localhost.localdomain systemd[1]: Starting Sleep.
-- Subject: Unit sleep.target has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit sleep.target has begun starting up.
Jun 19 08:11:05 localhost.localdomain systemd[1]: Starting Suspend...
-- Subject: Unit systemd-suspend.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit systemd-suspend.service has begun starting up.
Jun 19 08:11:05 localhost.localdomain systemd[1]: Starting Network Manager Script Dispatcher Service...
-- Subject: Unit NetworkManager-dispatcher.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit NetworkManager-dispatcher.service has begun starting up.
Jun 19 08:11:05 localhost.localdomain systemd-sleep[19112]: Suspending system...
-- Subject: System sleep state suspend entered
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- The system has now entered the suspend sleep state.
如何找出导致我的笔记本电脑进入睡眠状态的原因？