networking - Wifi problem with Ubuntu Gnome 16.04.1 LTS - Ask Ubuntu

so in these days i'm having problems connecting every ap around me. when notebook startup ok , no connection drop. after while (could 5 minutes 30 or 1h) connection drops out , can't connect anymore. service network-manager restart doesn't help, neither switch off , on wifi card need reboot. don't know because signal (about -40dbm intensity , 70/70 quality).

i've realtek rtl8723ae , output syslog:

nov  2 22:38:53 notebook kernel: [  897.126938] cfg80211:   (5490000 khz - 5710000 khz @ 160000 khz), (n/a, 2700 mbm), (0 s) nov  2 22:38:53 notebook kernel: [  897.126939] cfg80211:   (57000000 khz - 66000000 khz @ 2160000 khz), (n/a, 4000 mbm), (n/a) nov  2 22:38:55 notebook networkmanager[893]: <info>  [1478122735.1455] device (wlp8s0): supplicant interface state: associated -> 4-way handshake nov  2 22:38:55 notebook wpa_supplicant[985]: wlp8s0: wpa: key negotiation completed 64:**:**:**:**:59 [ptk=ccmp gtk=ccmp] nov  2 22:38:55 notebook wpa_supplicant[985]: wlp8s0: ctrl-event-connected - connection 64:**:**:**:**:59 completed [id=0 id_str=] nov  2 22:38:55 notebook networkmanager[893]: <info>  [1478122735.1518] device (wlp8s0): supplicant interface state: 4-way handshake -> completed nov  2 22:39:26 notebook systemd[1]: starting cleanup of temporary directories... nov  2 22:39:26 notebook systemd[1]: snapd.refresh.timer: adding 2h 45min 39.506581s random time. nov  2 22:39:26 notebook systemd-tmpfiles[2213]: [/usr/lib/tmpfiles.d/var.conf:14] duplicate line path "/var/log", ignoring. nov  2 22:39:26 notebook systemd[1]: started cleanup of temporary directories. nov  2 22:41:11 notebook kernel: [ 1034.429286] wlp8s0: connection ap 64:d1:a3:0a:f6:59 lost nov  2 22:41:11 notebook wpa_supplicant[985]: wlp8s0: ctrl-event-disconnected bssid=64:**:**:**:**:59 reason=4 locally_generated=1 nov  2 22:41:11 notebook networkmanager[893]: <warn>  [1478122871.3456] sup-iface[0x18b7fa0,wlp8s0]: connection disconnected (reason -4) nov  2 22:41:11 notebook wpa_supplicant[985]: wlp8s0: ctrl-event-regdom-change init=core type=world nov  2 22:41:11 notebook kernel: [ 1034.508801] cfg80211: world regulatory domain updated: nov  2 22:41:11 notebook kernel: [ 1034.508805] cfg80211:  dfs master region: unset nov  2 22:41:11 notebook kernel: [ 1034.508807] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) nov  2 22:41:11 notebook kernel: [ 1034.508810] cfg80211:   (2402000 khz - 2472000 khz @ 40000 khz), (n/a, 2000 mbm), (n/a) nov  2 22:41:11 notebook kernel: [ 1034.508812] cfg80211:   (2457000 khz - 2482000 khz @ 40000 khz), (n/a, 2000 mbm), (n/a) nov  2 22:41:11 notebook kernel: [ 1034.508814] cfg80211:   (2474000 khz - 2494000 khz @ 20000 khz), (n/a, 2000 mbm), (n/a) nov  2 22:41:11 notebook kernel: [ 1034.508817] cfg80211:   (5170000 khz - 5250000 khz @ 80000 khz, 160000 khz auto), (n/a, 2000 mbm), (n/a) nov  2 22:41:11 notebook kernel: [ 1034.508819] cfg80211:   (5250000 khz - 5330000 khz @ 80000 khz, 160000 khz auto), (n/a, 2000 mbm), (0 s) nov  2 22:41:11 notebook kernel: [ 1034.508821] cfg80211:   (5490000 khz - 5730000 khz @ 160000 khz), (n/a, 2000 mbm), (0 s) nov  2 22:41:11 notebook kernel: [ 1034.508823] cfg80211:   (5735000 khz - 5835000 khz @ 80000 khz), (n/a, 2000 mbm), (n/a) nov  2 22:41:11 notebook kernel: [ 1034.508825] cfg80211:   (57240000 khz - 63720000 khz @ 2160000 khz), (n/a, 0 mbm), (n/a)    nov  2 22:41:11 notebook networkmanager[893]: <info>  [1478122871.3660] device (wlp8s0): supplicant interface state: completed -> disconnected nov  2 22:41:11 notebook gnome-session[1532]: gjs-message: js log: active wireless connection, in infrastructure mode, involves no access point? nov  2 22:41:11 notebook networkmanager[893]: <info>  [1478122871.4510] device (wlp8s0): supplicant interface state: disconnected -> scanning nov  2 22:41:12 notebook wpa_supplicant[985]: wlp8s0: sme: trying authenticate 64:**:**:**:**:59 (ssid='***' freq=2412 mhz) nov  2 22:41:12 notebook kernel: [ 1035.522114] wlp8s0: authenticate 64:**:**:**:**:59 nov  2 22:41:12 notebook networkmanager[893]: <info>  [1478122872.4097] device (wlp8s0): supplicant interface state: scanning -> authenticating nov  2 22:41:12 notebook kernel: [ 1035.554570] wlp8s0: send auth 64:**:**:**:**:59 (try 1/3) nov  2 22:41:12 notebook kernel: [ 1035.657330] wlp8s0: send auth 64:**:**:**:**:59 (try 2/3) nov  2 22:41:12 notebook kernel: [ 1035.761290] wlp8s0: send auth 64:**:**:**:**:59 (try 3/3) nov  2 22:41:12 notebook kernel: [ 1035.865291] wlp8s0: authentication 64:**:**:**:**:59 timed out nov  2 22:41:12 notebook networkmanager[893]: <info>  [1478122872.7544] device (wlp8s0): supplicant interface state: authenticating -> disconnected nov  2 22:41:13 notebook networkmanager[893]: <info>  [1478122873.2550] device (wlp8s0): supplicant interface state: disconnected -> scanning nov  2 22:41:27 notebook networkmanager[893]: <warn>  [1478122887.0297] device (wlp8s0): link timed out. nov  2 22:41:27 notebook networkmanager[893]: <info>  [1478122887.0298] device (wlp8s0): state change: activated -> failed (reason 'ssid-not-found') [100 120 53] nov  2 22:41:27 notebook networkmanager[893]: <info>  [1478122887.0303] manager: networkmanager state connected_local nov  2 22:41:27 notebook networkmanager[893]: <info>  [1478122887.0306] manager: networkmanager state disconnected nov  2 22:41:27 notebook whoopsie[824]: [22:41:27] offline nov  2 22:41:27 notebook networkmanager[893]: <warn>  [1478122887.0353] device (wlp8s0): activation: failed connection '***'    nov  2 22:41:27 notebook dbus[849]: [system] activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' nov  2 22:41:27 notebook networkmanager[893]: <info>  [1478122887.0377] device (wlp8s0): state change: failed -> disconnected (reason 'none') [120 30 0] nov  2 22:41:27 notebook kernel: [ 1050.185210] ipv6: addrconf(netdev_up): wlp8s0: link not ready nov  2 22:41:27 notebook /usr/lib/gdm3/gdm-x-session[1521]: activating service name='ca.desrt.dconf' nov  2 22:41:27 notebook /usr/lib/gdm3/gdm-x-session[1521]: activated service 'ca.desrt.dconf' nov  2 22:41:27 notebook networkmanager[893]: <info>  [1478122887.0399] dns-mgr: removing dns information /sbin/resolvconf nov  2 22:41:27 notebook avahi-daemon[819]: withdrawing address record fe80::*** on wlp8s0. nov  2 22:41:27 notebook systemd[1]: starting network manager script dispatcher service... nov  2 22:41:27 notebook avahi-daemon[819]: withdrawing address record fe80::8741:470:6353:c57b on wlp8s0. nov  2 22:41:27 notebook gnome-session[1532]: gjs-message: js log: active wireless connection, in infrastructure mode, involves no access point? nov  2 22:41:27 notebook avahi-daemon[819]: withdrawing address record fe80::*** on wlp8s0. nov  2 22:41:27 notebook avahi-daemon[819]: leaving mdns multicast group on interface wlp8s0.ipv6 address fe80::***. nov  2 22:41:27 notebook avahi-daemon[819]: interface wlp8s0.ipv6 no longer relevant mdns. nov  2 22:41:27 notebook avahi-daemon[819]: withdrawing address record 192.168.0.150 on wlp8s0. nov  2 22:41:27 notebook avahi-daemon[819]: leaving mdns multicast group on interface wlp8s0.ipv4 address 192.168.0.150. nov  2 22:41:27 notebook avahi-daemon[819]: interface wlp8s0.ipv4 no longer relevant mdns. nov  2 22:41:27 notebook dbus[849]: [system] activated service 'org.freedesktop.nm_dispatcher' nov  2 22:41:27 notebook systemd[1]: started network manager script dispatcher service. nov  2 22:41:27 notebook nm-dispatcher: req:1 'down' [wlp8s0]: new request (1 scripts) nov  2 22:41:27 notebook nm-dispatcher: req:1 'down' [wlp8s0]: start running ordered scripts... nov  2 22:41:27 notebook gnome-session[1532]: gjs-message: js log: active wireless connection, in infrastructure mode, involves no access point? nov  2 22:41:27 notebook gnome-session[1532]: message repeated 4 times: [ gjs-message: js log: active wireless connection, in infrastructure mode, involves no access point?] nov  2 22:41:28 notebook networkmanager[893]: <info>  [1478122888.0340] device (wlp8s0): supplicant interface state: scanning -> inactive nov  2 22:41:3 

and output repeats many times. i've tried wireshark nothing note. can me? thanks.

install driver adapter. run

sudo add-apt-repository ppa:hanipouspilot/rtlwifi sudo apt update sudo apt install rtlwifi-new-dkms 

and reboot.