Периодически отключается wi-fi

[LirArs]

Периодически отключается wi-fi и не видит доступные сети
Перезагрузка помогает всегда.
В 10% случаев помогает
sudo service network-manager stop
sudo rfkill unblock all
sudo service network-manager start

~ $ iwconfig
wlp8s0 IEEE 802.11abg ESSID:"Названия точки"
Mode:Managed Frequency:2.412 GHz Access Point: E8:DE:27:6A:C9:91
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=53/70 Signal level=-57 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:112 Invalid misc:4799 Missed beacon:0

~ $ inxi -xxSN
System: Host: ***: 4.4.0-59-generic i686 (32 bit gcc: 5.4.0)
Desktop: Cinnamon 3.0.7 (Gtk 3.18.9-1ubuntu3.1) dm: mdm
Distro: Linux Mint 18 Sarah
Network: Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
driver: r8169 v: 2.3LK-NAPI port: 2000
bus-ID: 02:00.0 chip-ID: 10ec:8168
Card-2: Intel PRO/Wireless 3945ABG [Golan] Network Connection
driver: iwl3945 v: in-tree:s bus-ID: 08:00.0 chip-ID: 8086:4222

~ $ rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no