当我把电脑放在一边，电脑进入睡眠模式时，我回来后它无法连接到 WiFi，这与以前不同。我没有改变任何东西，只是让它保持原样，但回来后它根本无法连接到任何 WiFi 连接。
[编辑]我的设备是戴尔 Inspiron 3543
我没有打开任何省电设置。
执行后lspci我得到了这个：
06:00.0 Network controller: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n (rev 01)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller (rev 07)
执行后lshw -class network我得到：
*-network
description: Wireless interface
product: BCM43142 802.11b/g/n
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:06:00.0
logical name: wlp6s0
version: 01
serial: 2c:33:7a:fa:4c:ed
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) ip=192.168.1.111 latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:18 memory:ab200000-ab207fff
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: enp7s0
version: 07
serial: 74:e6:e2:45:a5:64
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:19 ioport:4000(size=256) memory:ab100000-ab100fff memory:d2100000-d2103fff
执行后ip link show我得到：
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
link/ether 74:e6:e2:45:a5:64 brd ff:ff:ff:ff:ff:ff
3: wlp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DORMANT group default qlen 1000
link/ether 2c:33:7a:fa:4c:ed brd ff:ff:ff:ff:ff:ff
[/编辑]
我正在使用 Ubuntu 18.04，并且它与 Windows 10 实现双启动，如果有任何变化的话。
我该怎么做才能解决这个问题？谢谢