O Ubuntu 14 pode detectar wifi, mas não consegue se conectar à internet

Question

Eu só tinha o meu Ubuntu 14 instalado, mas every now and then não consegue se conectar à internet, mesmo que ele mostre que ele está conectado ao wifi. Alguém sabe como consertar isso?

para ser específico, não funcionará com certeza depois de voltar de "suspender", somente depois de reiniciar o sistema, ele voltará ao trabalho. reiniciar o gerenciador de rede não fará o trabalho.

[  124.766933] rtl8723be 0000:02:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[  124.766935] rtl8723be 0000:02:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[  124.768786] wlan0: associate with 1c:af:f7:bf:7b:74 (try 1/3)
[  124.770896] wlan0: RX AssocResp from 1c:af:f7:bf:7b:74 (capab=0x411 status=0 aid=6)
[  124.771015] wlan0: associated
[  124.771026] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  124.804933] wlan0: deauthenticating from 1c:af:f7:bf:7b:74 by local choice (reason=2)
[  124.839042] cfg80211: Calling CRDA to update world regulatory domain
[  124.839612] wlan0: authenticate with 1c:af:f7:bf:7b:74
[  124.849728] wlan0: send auth to 1c:af:f7:bf:7b:74 (try 1/3)
[  124.849825] cfg80211: World regulatory domain updated:
[  124.849827] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  124.849829] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  124.849830] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  124.849831] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  124.849832] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  124.849833] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  124.855366] wlan0: authenticated
[  124.855584] rtl8723be 0000:02:00.0 wlan0: disabling HT/VHT due to WEP/TKIP use
[  124.855591] rtl8723be 0000:02:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[  124.855594] rtl8723be 0000:02:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[  124.856860] wlan0: associate with 1c:af:f7:bf:7b:74 (try 1/3)
[  124.860693] wlan0: RX AssocResp from 1c:af:f7:bf:7b:74 (capab=0x411 status=0 aid=6)
[  124.860852] wlan0: associated

    

Answer 1

Depois de mencionar que isso ocorre somente depois de voltar da suspensão, a solução a seguir parece funcionar:

sudo touch /etc/pm/sleep.d/wakenet.sh
sudo chmod +x /etc/pm/sleep.d/wakenet.sh
sudo gedit /etc/pm/sleep.d/wakenet.sh

Insira as seguintes linhas:

#!/bin/bash
case "$1" in
  thaw|resume)
    nmcli nm sleep false
    pkill -f wpa_supplicant
    ;;
  *)
    ;;
esac
exit $?

Fonte: link