我的 WiFi 网络连接有问题。尽管我仍连接到网络，但总是断线。每次发生这种情况时，我都会输入以下命令：
sudo systemctl restart NetworkManager
然后我的互联网连接恢复了。
我将在下面发布我的驱动程序版本和其他信息，希望有人能够帮助我解决这个问题。
bukojuice@Ubuntu-xps:~$ uname -r
5.0.0-31-generic
bukojuice@Ubuntu-xps:~$ sudo lshw -C network
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:0c:00.0
logical name: wlp12s0
version: 01
serial:
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.0.0-31-generic firmware=N/A ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:f6880000-f68fffff memory:f6900000-f690fff
你好，我发现一个错误journalctl -b 0 /usr/sbin/NetworkManager
Oct 16 08:47:54 Ubuntu-xps NetworkManager[18018]: <warn> [1571186874.0452] sup-iface[0x557cc3bcb230,wlp12s0]: connection disconnected (reason -4)
Oct 16 08:47:54 Ubuntu-xps NetworkManager[18018]: <info> [1571186874.0693] device (wlp12s0):supplicant interface state: completed -> disconnected
Oct 16 08:47:54 Ubuntu-xps NetworkManager[18018]: <info> [1571186874.1633] device (wlp12s0): supplicant interface state: disconnected -> scanning
Oct 16 08:48:01 Ubuntu-xps NetworkManager[18018]: <info> [1571186881.3148] device (wlp12s0): supplicant interface state: scanning -> authenticating
Oct 16 08:48:01 Ubuntu-xps NetworkManager[18018]: <info> [1571186881.3355] device (wlp12s0): supplicant interface state: authenticating -> associated
Oct 16 08:48:01 Ubuntu-xps NetworkManager[18018]: <info> [1571186881.4357] device (wlp12s0): supplicant interface state: associated -> 4-way handshake
Oct 16 08:48:01 Ubuntu-xps NetworkManager[18018]: <info> [1571186881.4421] device (wlp12s0): supplicant interface state: 4-way handshake -> completed
Oct 16 08:50:58 Ubuntu-xps NetworkManager[18018]: <info> [1571187058.7186] caught SIGTERM, shutting down normally.
Oct 16 08:50:58 Ubuntu-xps NetworkManager[18018]: <info> [1571187058.7248] device (wlp12s0): state change: activated -> deactivating (reason'unmanage
Oct 16 08:50:58 Ubuntu-xps NetworkManager[18018]: <info> [1571187058.7252] manager: NetworkManager state is now DISCONNECTING
Oct 16 08:50:58 Ubuntu-xps NetworkManager[18018]: <info> [1571187058.7794] device (wlp12s0): state change: deactivating -> unmanaged (reason 'removed'
Oct 16 08:50:59 Ubuntu-xps NetworkManager[18018]: <info> [1571187059.2326] manager: NetworkManager state is now DISCONNECTED
Oct 16 08:50:59 Ubuntu-xps NetworkManager[18018]: <info> [1571187059.2745] exiting (success)
答案1
您可以使用这个答案的一部分：
创建此脚本：
#!/bin/sh
# NAME: /lib/systemd/system-sleep/network-reset
# DESC: Resets network manager after a suspend.
# DATE: December 14, 2019.
MYNAME=$0
restart_wifi() {
/usr/bin/logger $MYNAME 'restart_wifi BEGIN'
systemctl restart NetworkManager.service
/usr/bin/logger $MYNAME 'restart_wifi END'
}
/usr/bin/logger $MYNAME 'case=[' ${1}' ]'
case "${1}/${2}" in
hibernate|suspend|pre*)
;;
resume|thaw|post*)
restart_wifi;;
esac
使用以下命令使脚本可执行：
sudo chmod a+x /lib/systemd/system-sleep/network-reset
笔记：这个答案解决了问题的影响，但并没有解决问题的根源。