硬件：Dell XPS 13 9350 无线网卡：Intel 7265 11ac 无线网卡，带蓝牙 4.0
症状：在看似随机的时间，网络会断开，无线接口似乎消失。我运行了一些诊断程序，其输出如下：
任何帮助都值得感激 - 当这种情况发生时我必须重新启动机器才能重新启用无线。
正常工作时的输出：
Kernel Version:
uname -r
4.4.0-22-generic
Network Card:
sudo lshw -C network
*-network
description: Wireless interface
product: Wireless 7265
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:3a:00.0
logical name: wlp58s0
version: 59
serial: 10:02:b5:34:d2:3f
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-22-generic firmware=16.242414.0 ip=192.168.1.164 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:284 memory:dc200000-dc201fff
Network Config:
iwconfig
docker0 no wireless extensions.
lo no wireless extensions.
wlp58s0 IEEE 802.11abgn ESSID:"EE-xs954q"
Mode:Managed Frequency:2.462 GHz Access Point: C4:E9:84:80:6C:00
Bit Rate=300 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=70/70 Signal level=-38 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:74 Missed beacon:0
sudo ifconfig wlan0
wlan0: error fetching interface information: Device not found
Can Scan?
sudo iwlist wlan0 scanning
wlan0 Interface doesn't support scanning.
Module Conf:
ls -aFC /etc/modprobe.d
./ blacklist-framebuffer.conf fbdev-blacklist.conf
../ blacklist-modem.conf iwlwifi.conf
alsa-base.conf blacklist-oss.conf@ mlx4.conf
blacklist-ath_pci.conf blacklist-rare-network.conf vmwgfx-fbdev.conf
blacklist.conf blacklist-watchdog.conf
blacklist-firewire.conf dkms.conf
Wireless Module:
iwlmvm 311296 0
mac80211 737280 1 iwlmvm
iwlwifi 200704 1 iwlmvm
cfg80211 565248 3 iwlwifi,mac80211,iwlmvm
NetworkManager State:
cat /var/lib/NetworkManager/NetworkManager.state
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
NetworkManager Status:
sudo /etc/init.d/network-manager status
● NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2016-05-21 12:03:20 BST; 2min 38s ago
Main PID: 1011 (NetworkManager)
Tasks: 5 (limit: 512)
Memory: 12.6M
CPU: 792ms
CGroup: /system.slice/NetworkManager.service
├─1011 /usr/sbin/NetworkManager --no-daemon
├─1522 /sbin/dhclient -d -q -sf /usr/lib/NetworkManager/nm-dhcp-helper -pf /var/run/dhclient-wlp58s0.pid -lf /var/lib/NetworkManager/dhclient-1aa3bca2-2563-4fcb-949d-5dd19db09ac4-wlp58s0.lease -cf /var/lib/NetworkManager/dhclient-wlp58s0.conf wlp58s0
└─1533 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/NetworkManager/dnsmasq.pid --listen-address=127.0.1.1 --cache-size=0 --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d
May 21 12:03:24 ant-XPS-13-9350 dnsmasq[1533]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify
May 21 12:03:24 ant-XPS-13-9350 dnsmasq[1533]: DBus support enabled: connected to system bus
May 21 12:03:24 ant-XPS-13-9350 dnsmasq[1533]: warning: no upstream servers configured
May 21 12:03:24 ant-XPS-13-9350 NetworkManager[1011]: <info> [1463828604.7731] device (wlp58s0): Activation: successful, device activated.
May 21 12:03:24 ant-XPS-13-9350 NetworkManager[1011]: <info> [1463828604.7746] dnsmasq[0x26f2440]: dnsmasq appeared as :1.31
May 21 12:03:24 ant-XPS-13-9350 NetworkManager[1011]: <info> [1463828604.7747] dns-mgr: Writing DNS information to /sbin/resolvconf
May 21 12:03:24 ant-XPS-13-9350 dnsmasq[1533]: setting upstream servers from DBus
May 21 12:03:24 ant-XPS-13-9350 dnsmasq[1533]: using nameserver 192.168.1.1#53
May 21 12:03:30 ant-XPS-13-9350 NetworkManager[1011]: <info> [1463828610.9813] WiFi hardware radio set enabled
May 21 12:03:30 ant-XPS-13-9350 NetworkManager[1011]: <info> [1463828610.9814] WWAN hardware radio set enabled
Wireless State:
sudo rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Try:
sudo rfkill unblock all
sudo /etc/init.d/network-manager restart
http://www.linuxquestions.org/questions/ubuntu-63/wireless-became-disabled-how-do-i-enable-858357/
Also try:
sudo ifconfig wlan0 up
sudo rfkill event
网络消失时的输出：
Kernel Version:
uname -r
4.4.0-22-generic
Network Card:
sudo lshw -C network
*-network UNCLAIMED
description: Network controller
product: Wireless 7265
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:3a:00.0
version: 59
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: memory:dc200000-dc201fff
Network Config:
iwconfig
docker0 no wireless extensions.
lo no wireless extensions.
sudo ifconfig wlan0
wlan0: error fetching interface information: Device not found
Can Scan?
sudo iwlist wlan0 scanning
wlan0 Interface doesn't support scanning.
Module Conf:
ls -aFC /etc/modprobe.d
./ blacklist-framebuffer.conf fbdev-blacklist.conf
../ blacklist-modem.conf iwlwifi.conf
alsa-base.conf blacklist-oss.conf@ mlx4.conf
blacklist-ath_pci.conf blacklist-rare-network.conf vmwgfx-fbdev.conf
blacklist.conf blacklist-watchdog.conf
blacklist-firewire.conf dkms.conf
Wireless Module:
iwlmvm 311296 0
mac80211 737280 1 iwlmvm
iwlwifi 200704 1 iwlmvm
cfg80211 565248 3 iwlwifi,mac80211,iwlmvm
NetworkManager State:
cat /var/lib/NetworkManager/NetworkManager.state
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
NetworkManager Status:
sudo /etc/init.d/network-manager status
● NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2016-05-21 11:20:00 BST; 31min ago
Main PID: 8688 (NetworkManager)
Tasks: 4 (limit: 512)
Memory: 13.1M
CPU: 1.057s
CGroup: /system.slice/NetworkManager.service
├─1506 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/NetworkManager/dnsmasq.pid --listen-address=127.0.1.1 --cache-size=0 --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d
└─8688 /usr/sbin/NetworkManager --no-daemon
May 21 11:20:00 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826000.9897] device (docker0): state change: ip-check -> secondaries (reason 'none') [80 90 0]
May 21 11:20:00 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826000.9900] device (docker0): state change: secondaries -> activated (reason 'none') [90 100 0]
May 21 11:20:00 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826000.9901] manager: NetworkManager state is now CONNECTED_LOCAL
May 21 11:20:01 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826001.0022] device (docker0): Activation: successful, device activated.
May 21 11:20:01 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826001.0029] bluez: use BlueZ version 5
May 21 11:20:01 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826001.0033] ModemManager available in the bus
May 21 11:20:01 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826001.0081] ofono is now available
May 21 11:20:01 ant-XPS-13-9350 NetworkManager[8688]: <warn> [1463826001.0121] failed to enumerate oFono devices: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.ofono was not provided by any .service files
May 21 11:20:11 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826011.3478] WiFi hardware radio set enabled
May 21 11:20:11 ant-XPS-13-9350 NetworkManager[8688]: <info> [1463826011.3480] WWAN hardware radio set enabled
Wireless State:
sudo rfkill list all
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Try:
sudo rfkill unblock all
sudo /etc/init.d/network-manager restart
http://www.linuxquestions.org/questions/ubuntu-63/wireless-became-disabled-how-do-i-enable-858357/
Also try:
sudo ifconfig wlan0 up
sudo rfkill event
答案1
我最后写了一个重新加载wifi驱动程序的脚本：
#!/bin/bash
if [ "$1" == "-r" ]
then
sudo rm -rf /lib/firmware/ath10k
sudo apt install --reinstall linux-firmware
fi
sudo modprobe ath10k_core
sudo modprobe ath10k_pci
实际上，这个脚本是为我的新戴尔电脑设计的，它有同样的问题，但无线网卡不同。对于装有英特尔网卡的旧机器，有一个更简单的解决方法，只需使用 nmcli 重新启动 wifi 设备即可。如果我没记错的话，就像这样：
nmcli radio wifi off
nmcli radio wifi on
但是，大约 6 周前的一个更新似乎已经修复了两台机器上的问题。我想把这个问题留着，以防有人遇到类似的问题。