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Thread: Strong wifi signal but cannot connect

  1. #1
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    Default Strong wifi signal but cannot connect

    I've recently returned to the openSUSE fold after a prolonged absence. I installed openSUSE Leap 15.1 and, when at home, was able to connect to my home wifi network.

    I took my laptop to the office so that I could get it to perform all necessary updates during the day but am unable to connect to the office wifi - either the secured or the open networks.

    The default network manager can see the networks and appears to have a good signal - solid blue bar above the signal strength indicator. Unfortunately, this is accompanied by a yellow question mark. I can click on the signal and select the network. I get a 'Configuring interface' message below the chosen network, then it stops and 'Never used' appears below the network.

    I'm pretty sure that there's a simple solution - but I cannot for the life of me find it.
    Alastair Scott

    openSUSE LEAP

  2. #2
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    Default Re: Strong wifi signal but cannot connect

    Let's start with diagnostics...

    Check that wicked and NM are both not concurrently active....
    Code:
    sudo systemctl status wicked
    Code:
    sudo systemctl status NetworkManager
    If that checks out ok, then run

    Code:
    sudo journalctl -fu NetworkManager
    Attempt to start the connection, and watch/capture the NetworkManager output. That should help with identifying what is going wrong here.
    openSUSE Leap 15.0; KDE Plasma 5

  3. #3
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    Default Re: Strong wifi signal but cannot connect

    Thanks.

    Wicked is not running.

    I've tried the connection again, on the open network. The konsole window shows three or four attempts to connect:

    > device (wlan0): supplicant interface state: disabled -> inactive
    > device (wlan0): supplicant interface state: inactive -> scanning
    > device (wlan0): supplicant interface state: scanning -> autheticating
    > device (wlan0): supplicant interface state: autheticating -> disconnected
    > device (wlan0): activation: (wifi) association took too long, failing activation
    > device (wlan0): activation: state change: config -> failed (reason 'ssid-not-found', sys-iface-state: 'managed'

    Does this help? I can't cut and paste the output as I'm posting using mu works PC and running the laptop separately.

    Like I said, it connects without issue to my secured network at home.
    Alastair Scott

    openSUSE LEAP

  4. #4
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    Question Re: Strong wifi signal but cannot connect

    Quote Originally Posted by aescott View Post
    I took my laptop to the office so that I could get it to perform all necessary updates during the day but am unable to connect to the office wifi - either the secured or the open networks.
    Are you sure that, the office network is not checking for "known MAC addresses"?
    • A conscientious network manager nails the WLAN to only accept a known list of MAC addresses …


    Quote Originally Posted by aescott View Post
    The default network manager can see the networks and appears to have a good signal - solid blue bar above the signal strength indicator. Unfortunately, this is accompanied by a yellow question mark. I can click on the signal and select the network. I get a 'Configuring interface' message below the chosen network, then it stops and 'Never used' appears below the network.
    Which Desktop GUI are you using?
    Which Network Manager widget are you using?
    Is the "new" Firewall (firewalld) installed?
    If yes, have installed the yast2-firewall package?
    I suggest that, the WLAN interface (usually wlan0) be assigned to the "trusted" firewall zone for initial connection setup -- you can change to a more secure zone once the connection setup has been successfully completed …

    Quote Originally Posted by aescott View Post
    Wicked is not running.
    Have you disabled all of the following systemd services?
    • wicked.service
    • wickedd-auto4.service
    • wickedd-dhcp4.service
    • wickedd-dhcp6.service
    • wickedd-nanny.service


    Quote Originally Posted by aescott View Post
    I've tried the connection again, on the open network. The konsole window shows three or four attempts to connect:

    > device (wlan0): supplicant interface state: disabled -> inactive
    > device (wlan0): supplicant interface state: inactive -> scanning
    > device (wlan0): supplicant interface state: scanning -> autheticating
    > device (wlan0): supplicant interface state: autheticating -> disconnected
    > device (wlan0): activation: (wifi) association took too long, failing activation
    > device (wlan0): activation: state change: config -> failed (reason 'ssid-not-found', sys-iface-state: 'managed'
    Could be either a Firewall issue (see above) or, the "open" network is not really open -- see the "only accept known MAC addresses" comment above …

    Quote Originally Posted by aescott View Post
    Like I said, it connects without issue to my secured network at home.
    Which Firewall zone are you using for the home WLAN?

  5. #5
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    Default Re: Strong wifi signal but cannot connect

    Quote Originally Posted by aescott View Post
    Thanks.

    Wicked is not running.

    I've tried the connection again, on the open network. The konsole window shows three or four attempts to connect:

    > device (wlan0): supplicant interface state: disabled -> inactive
    > device (wlan0): supplicant interface state: inactive -> scanning
    > device (wlan0): supplicant interface state: scanning -> autheticating
    > device (wlan0): supplicant interface state: autheticating -> disconnected
    > device (wlan0): activation: (wifi) association took too long, failing activation
    > device (wlan0): activation: state change: config -> failed (reason 'ssid-not-found', sys-iface-state: 'managed'

    Does this help? I can't cut and paste the output as I'm posting using mu works PC and running the laptop separately.
    A good idea in situations like this is to save the output to a text file, and transfer via a memory stick to an an internet-connected machine. Anyway, from the last line of output you shared, the AP's SSID is not found. So, that would explain why no connection is made. The connection profile needs to be edited or remove and start over.
    openSUSE Leap 15.0; KDE Plasma 5

  6. #6
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    Default Re: Strong wifi signal but cannot connect

    BTW, you can scan for APs from the CLI with
    Code:
    iwlist wlan0 scan
    That will at least let you check what is around.
    openSUSE Leap 15.0; KDE Plasma 5

  7. #7
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    Default Re: Strong wifi signal but cannot connect

    Is the "new" Firewall (firewalld) installed?
    If yes, have installed the yast2-firewall package?
    I suggest that, the WLAN interface (usually wlan0) be assigned to the "trusted" firewall zone for initial connection setup -- you can change to a more secure zone once the connection setup has been successfully completed …
    No, the firewall has nothing to do with the wifi connection process. It's not an IP-level process - it's effectively layer 1.
    openSUSE Leap 15.0; KDE Plasma 5

  8. #8
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    Default Re: Strong wifi signal but cannot connect

    Thanks all.

    Sadly, work looks like being quite busy today so I won't have much opportunity to look at any of the suggestions.

    I thought about MAC filtering but have been able to connect other devices to the network without regsitering their MAC addresses, so that's not the issue.

    It'll give me something to do next week.... :-)
    Alastair Scott

    openSUSE LEAP

  9. #9
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    Default Re: Strong wifi signal but cannot connect

    Quote Originally Posted by vidmates View Post
    Many people have the false conception that wifi = internet. Wifi is just a wireless protocal that allows you to wirelessly send the data that you would send over an ethernet lan cable. Thus your wifi is fine, it is your internet connection that is having a problem.
    While your observation that many people confuse Internet connection with Wfi connection is in general correct, I see no information above that that is the case here. Nor see I any prove that the Wifi is fine. So please read all info above carefully and when you have a useful contribution to make, please do so. What you posted now is not of much help to the OP IMHO.
    Henk van Velden

  10. #10
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    Default Re: Strong wifi signal but cannot connect

    Quote Originally Posted by aescott View Post
    ... I installed openSUSE Leap 15.1
    As far as i know openSUSE Leap 15.1 is not yet released (ALPHA or BETA stage). It might be a better idea to use the current release (openSUSE Leap 15.0).

    Regards

    susejunky

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