Ubuntu – WiFi connects, but pages don’t load

networkingwireless

Unfortunately, this problem didn't have an obvious cause or beginning, as it only became noticeable after repeating. My computer would just fail to load pages after a few minutes on a certain WiFi. I tried "ping google.com":

ping: google.com: Name or service not known

All other devices connect to this WiFi without problems. When I create a WiFi bridge through my phone and connect to that, it works normally.

All network issues I found on Ask Ubuntu were "unable to connect to network" problems, but my computer stays connected the entire time. The WiFi just eventually stops transmitting any information.

I had Ubuntu 18.04 and upgraded to 20.04. The problem persists.

EDIT: In response to johncli:

1:

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available

etc.

Is the rest of your answer applicable in this situation?

3: The file clearly cannot be edited by hand:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.

nameserver 127.0.0.53
search home

The output of ifconfig:

enp3s0f1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether a8:1e:84:81:4b:4e  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 18233  bytes 1725789 (1.7 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 18233  bytes 1725789 (1.7 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.136  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::fbeb:d153:68ac:c2f1  prefixlen 64  scopeid 0x20<link>
        ether 3c:a0:67:af:bb:61  txqueuelen 1000  (Ethernet)
        RX packets 1161729  bytes 1493982625 (1.4 GB)
        RX errors 0  dropped 600  overruns 0  frame 0
        TX packets 470115  bytes 91019517 (91.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

The output of route -n:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref        Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    600    0            0 wlp2s0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0            0 wlp2s0
192.168.0.0     0.0.0.0         255.255.255.0   U     600    0            0 wlp2s0

I checked this answer. It delays the problems for a while, but they reappear after half an hour or so. If it is any use, the log shows, several times,

Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.

Edit 2: Reply to William Martens:

The output of sudo service network-manager status:

NetworkManager.service - Network Manager
     Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2020-10-08 17:44:44 CEST; 20h ago
       Docs: man:NetworkManager(8)
   Main PID: 35927 (NetworkManager)
      Tasks: 4 (limit: 9322)
     Memory: 7.8M
     CGroup: /system.slice/NetworkManager.service
             └─35927 /usr/sbin/NetworkManager --no-daemon

říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9406] dhcp4 (wlp2s0): option requested_rfc3442_classless_static_routes => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9406] dhcp4 (wlp2s0): option requested_root_path  => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9406] dhcp4 (wlp2s0): option requested_routers    => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9406] dhcp4 (wlp2s0): option requested_static_routes => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9406] dhcp4 (wlp2s0): option requested_subnet_mask => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9407] dhcp4 (wlp2s0): option requested_time_offset => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9407] dhcp4 (wlp2s0): option requested_wpad       => '1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9407] dhcp4 (wlp2s0): option routers              => '192.168.0.1'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9407] dhcp4 (wlp2s0): option subnet_mask          => '255.255.255.0'
říj 09 14:15:48 matej-Aspire-E5-575 NetworkManager[35927]: <info>  [1602245748.9407] dhcp4 (wlp2s0): state changed extended -> extended

(říj would presumably be oct in English)

EDIT 3:

There is nothing I did with any wireless settings that directly preceded this. I had installed and uninstalled Proton VPN, but that was a long time before this problem. I (un)fortunately don't have this problem anymore, so I cannot provide diagnostic data. However, all the answers to similar questions are either diagnostics or shots in the dark. The ones that seem to have worked are all restarts, but it isn't clear how the problem originated.

Similar questions with no good answers:

Wifi connected but no data transfer: "ping: sendmsg: No buffer space available"

wifi connected but no internet, is this the end?

Connected to wifi, but quits loading pages after a random amount of time

wifi doesn't work in Ubuntu 14.04 after a short time until I restart the system

WiFi problem with hp probook (commands provided with no explanation return Error 404)

Wifi connected but no internet access (Lubuntu 14.04)

Wifi apparently connected, but webpages won't load

Best Answer

    1. Try to ping 8.8.8.8 or any other ip to check internet access.
      • you can ping any other public address that is "up" for sure
    2. If the ping success then you have internet and the problem is on DNS configuration.
    3. Exec the command sudo nano /etc/resolv.conf.
    4. It is probably sets on "nameserver" as localhost ip (127.0.0.53).
    5. If it is on 127.0.0.53 change the address to 1.1.1.1 or 8.8.8.8.
      • you can change the address to any good Domain Name Server.
      • i am using 1.1.1.1 as my favorite.
    6. Save the resolv.conf file.
    7. Exec the command sudo systemctl restart network-manager.service
    8. Try to ping a domain address like google.com or just open the web and surf to a website to check if the change helped out.
    9. Please comment the output or the settings that you find out for we can solve the issue togther.
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