現象：1) 點擊任務欄的無線圖標，點擊開啟會多次返回關閉，偶爾可以正常打開，但找不到網絡。
2) 重啟網卡管理服務，仍然顯示Down
root@xxx-PC:systemctl restart network-manager
root@xxx-PC:/home/xxx# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: wlp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000 link/ether a0:af:bd:68:54:d9 brd ff:ff:ff:ff:ff:ff
解決方法：
echo "blacklist acer_wmi" >/etc/modprobe.d/blacklist-bcm43.conf update-initramfs -u reboot