几个月以来，我的 wifi 连接一直有问题。我可以连接到路由器，DNS 似乎可以正常工作，但我无法上网。奇怪的是，这种情况会随机发生，并且会随机解决（一天几次）。我不知道发生了什么。
如果您需要更多信息，请告诉我。任何帮助都将不胜感激！
tomas@Yoga:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic
tomas@Yoga:~$ uname -r
4.15.0-47-generic
tomas@Yoga:~$ sudo lspci -vn
...
01:00.0 0280: 14e4:43b1 (rev 03)
Subsystem: 17aa:0623
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at c1200000 (64-bit, non-prefetchable) [size=32K]
Memory at c1000000 (64-bit, non-prefetchable) [size=2M]
Capabilities: [48] Power Management version 3
Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [68] Vendor Specific Information: Len=44 <?>
Capabilities: [ac] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Device Serial Number 2c-33-00-ff-ff-00-00-01
Capabilities: [150] Power Budgeting <?>
Capabilities: [160] Virtual Channel
Kernel driver in use: wl
Kernel modules: bcma, wl
tomas@Yoga:~$ sudo cat /etc/NetworkManager/system-connections/TelenetWiFree
[connection]
id=TelenetWiFree
uuid=3c973a3d-48fe-4aee-b78c-0323eb02bb7c
type=wifi
permissions=user:kubuntu:;
[wifi]
mac-address-blacklist=
mode=infrastructure
ssid=TelenetWiFree
[wifi-security]
key-mgmt=wpa-eap
[802-1x]
eap=peap;
identity=t195917
password=*****************
phase2-auth=mschapv2
[ipv4]
dns-search=
method=auto
[ipv6]
addr-gen-mode=stable-privacy
dns-search=
method=auto
tomas@Yoga:~$ sudo lshw -class network
*-network
description: Wireless interface
product: BCM4352 802.11ac Wireless Network Adapter
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlp1s0
version: 03
serial: 2c:33:7a:f0:df:e9
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) ip=10.127.226.93 latency=0 multicast=yes wireless=IEEE 802.11
resources: irq:18 memory:c1200000-c1207fff memory:c1000000-c11fffff
*-network:0
description: Ethernet interface
physical id: 3
logical name: virbr0
serial: 52:54:00:a1:8d:f4
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=192.168.122.1 link=no multicast=yes
*-network:1 DISABLED
description: Ethernet interface
physical id: 4
logical name: virbr0-nic
serial: 52:54:00:a1:8d:f4
size: 10Mbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=no multicast=yes port=twisted pair speed=10Mbit/s
tomas@Yoga:~$ rfkill list all
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
3: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
8: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
回复 vidarlo 。互联网目前正在运行，如果不能运行，我会再次尝试这些命令。
tomas@Yoga:~$ ip route
default via 10.127.128.1 dev wlp1s0 proto dhcp metric 600
10.127.128.0/17 dev wlp1s0 proto kernel scope link src 10.127.205.52 metric 600
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
tomas@Yoga:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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: wlp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 2c:33:7a:f0:df:e9 brd ff:ff:ff:ff:ff:ff
inet 10.127.205.52/17 brd 10.127.255.255 scope global dynamic noprefixroute wlp1s0
valid_lft 532sec preferred_lft 532sec
inet6 fe80::de0e:ee8a:956d:330f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:a1:8d:f4 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:a1:8d:f4 brd ff:ff:ff:ff:ff:ff
tomas@Yoga:~$ ping -c 2 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=121 time=192 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=121 time=24.7 ms
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 24.700/108.760/192.821/84.061 ms
互联网无法正常工作：
tomas@Yoga:~$ ip route
default via 10.123.128.1 dev wlp1s0 proto dhcp metric 600
10.123.128.0/17 dev wlp1s0 proto kernel scope link src 10.123.215.188 metric 600
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
tomas@Yoga:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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: wlp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 2c:33:7a:f0:df:e9 brd ff:ff:ff:ff:ff:ff
inet 10.123.215.188/17 brd 10.123.255.255 scope global dynamic noprefixroute wlp1s0
valid_lft 459sec preferred_lft 459sec
inet6 fe80::de0e:ee8a:956d:330f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:a1:8d:f4 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:a1:8d:f4 brd ff:ff:ff:ff:ff:ff
tomas@Yoga:~$ ping -c 2 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1023ms
为了表明 DNS 正在工作：
tomas@Yoga:~$ sudo systemd-resolve --flush-caches
[sudo] wachtwoord voor tomas:
tomas@Yoga:~$ sudo systemd-resolve --statistics
DNSSEC supported by current servers: no
Transactions
Current Transactions: 0
Total Transactions: 3313
Cache
Current Cache Size: 5
Cache Hits: 365
Cache Misses: 135
DNSSEC Verdicts
Secure: 0
Insecure: 0
Bogus: 0
Indeterminate: 0
tomas@Yoga:~$ ping -c 2 belgium.be
PING belgium.be (193.191.245.244) 56(84) bytes of data.
--- belgium.be ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1022ms
这告诉了你什么吗？
回复 Marmayogi 。互联网目前正在运行，我对 /etc/modprobe.d/blacklist.conf 进行了更改，并在使用完互联网后重新启动...
tomas@Yoga:~$ echo "# blacklisting ideapad_wlan ......" | sudo tee -a /etc/modprobe.d/blacklist.conf
[sudo] wachtwoord voor tomas:
# blacklisting ideapad_wlan ......
tomas@Yoga:~$ echo "blacklist ideapad_wlan" | tee -a /etc/modprobe.d/blacklist.conf
blacklist ideapad_wlan
tomas@Yoga:~$ sudo tail /etc/modprobe.d/blacklist.conf
...
# blacklisting ideapad_wlan ......
blacklist ideapad_wlan
现在正在重新启动。
tomas@Yoga:~$ sudo reboot
互联网正在运行，我会检查它是否会再次断线......
tomas@Yoga:~$ sudo systemctl restart systemd-modules-load.service
[sudo] wachtwoord voor tomas:
tomas@Yoga:~$
互联网不再工作。我应该删除 ideapad 黑名单吗？你能解释一下你为什么提出这个建议吗？还有其他建议吗？
tomas@Yoga:~$ sudo nmcli device
[sudo] wachtwoord voor tomas:
DEVICE TYPE STATE CONNECTION
wlp1s0 wifi verbonden TelenetWiFree
virbr0 bridge verbonden virbr0
lo loopback onbeheerd --
virbr0-nic tun onbeheerd --
tomas@Yoga:~$ sudo rfkill
ID TYPE DEVICE SOFT HARD
0 wlan ideapad_wlan unblocked unblocked
1 bluetooth ideapad_bluetooth unblocked unblocked
2 wlan phy0 unblocked unblocked
3 wlan brcmwl-0 unblocked unblocked
6 bluetooth hci0 unblocked unblocked
systemctl restart ... 没有输出：
tomas@Yoga:~$ sudo systemctl restart systemd-modules-load.service
tomas@Yoga:~$
tomas@Yoga:~$ tail -n2 /etc/modprobe.d/blacklist.conf
# blacklisting ideapad_wlan ......
blacklist ideapad_laptop
tomas@Yoga:~$ sudo reboot
...
tomas@Yoga:~$ sudo systemctl restart systemd-modules-load.service
[sudo] wachtwoord voor tomas:
tomas@Yoga:~$ sudo nmcli device
DEVICE TYPE STATE CONNECTION
virbr0 bridge verbonden virbr0
wlp1s0 wifi verbinden (configureren) TelenetWiFree
lo loopback onbeheerd --
virbr0-nic tun onbeheerd --
tomas@Yoga:~$ sudo rfkill
ID TYPE DEVICE SOFT HARD
0 wlan phy0 unblocked unblocked
1 wlan brcmwl-0 unblocked unblocked
2 bluetooth hci0 unblocked unblocked