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Thread: WiFi losing signal, Network controller: Intel Corporation Dual Band Wireless-AC 3165

  1. #1
    Join Date
    Dec 2014
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    8

    WiFi losing signal, Network controller: Intel Corporation Dual Band Wireless-AC 3165

    The problem appears on freshly installed Ubuntu 18.04 on Lenovo IdeaPad (originally it came with Windows). Wifi seems to be turned on all the time but from time to time (sometimes it works fine for a few days, more often it happens every few hours, sometimes a few times in one hour) it looks like loosing signal - it begins to be weaker and weaker to breaking up completely. Sometimes turning wifi off and on helps, sometimes even restart doesn't. Everything is back to normal after 20-30 minutes, sometimes sooner, sometimes later. Wifi itself and router work fine as we've got no problems with other devices at all.

    The output of `lspci | grep -i "Wireless\|Wifi"` is `01:00.0 Network controller: Intel Corporation Dual Band Wireless-AC 3165 Plus Bluetooth (rev 99)`

    Could you please help?

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    7,790
    Distro
    Ubuntu Mate 16.04 Xenial Xerus

    Re: WiFi losing signal, Network controller: Intel Corporation Dual Band Wireless-AC 3

    Please try
    Code:
    echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi-11n.conf
    sudo modprobe -rfv iwlwifi
    sudo modprobe -v iwlwifi

  3. #3
    Join Date
    Dec 2014
    Beans
    8

    Re: WiFi losing signal, Network controller: Intel Corporation Dual Band Wireless-AC 3

    The results are respectively:

    options iwlwifi 11n_disable=1

    remove (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) && /sbin/modprobe -r mac80211
    rmmod mac80211
    rmmod cfg80211


    insmod /lib/modules/5.0.0-37-generic/kernel/net/wireless/cfg80211.ko
    insmod /lib/modules/5.0.0-37-generic/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko 11n_disable=1

    Could you please explain what do these do?

  4. #4
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    7,790
    Distro
    Ubuntu Mate 16.04 Xenial Xerus

    Re: WiFi losing signal, Network controller: Intel Corporation Dual Band Wireless-AC 3

    It disables the N-mode, a typical Intel feature. Did it improve stability? If not do
    Code:
    sudo sed -i "s/wifi.powersave = 3/wifi.powersave = 2/g" /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
    sudo systemctl restart network-manager.service

  5. #5
    Join Date
    Dec 2014
    Beans
    8

    Re: WiFi losing signal, Network controller: Intel Corporation Dual Band Wireless-AC 3

    Sorry for the delay. It looks like it helped. Thank you for your support!

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