with ubuntu 16.04 wireless connection fails and requires new start

What is the output of:

sudo lshw -C network; lsb_release -a; uname -a; sudo rfkill list

Thanks

hallo andrew
here is the output.
Today the network connection icon ( what i called wireless app icon yesterday) is not working at all and the wireless connection is functioning perfectly. And of course i am using 16.10 instead of 16.04
thanks
pat

 *-network
       description: Ethernet interface
       product: NetXtreme BCM5751M Gigabit Ethernet PCI Express
       vendor: Broadcom Limited
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: ens2
       version: 21
       serial: 00:16:d3:39:f8:16
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 firmware=5751m-v3.56 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:32 memory:ee100000-ee10ffff
  *-network
       description: Wireless interface
       product: PRO/Wireless 3945ABG [Golan] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wls3
       version: 02
       serial: 00:19:d2:97:df:87
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwl3945 driverversion=4.8.0-34-generic firmware=15.32.2.9 ip=192.168.1.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:31 memory:edf00000-edf00fff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.10
Release: 16.10
Codename: yakkety
Linux byrne-ThinkPad-R60 4.8.0-34-generic #36-Ubuntu SMP Wed Dec 21 17:24:18 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
0: tpacpi_bluetooth_sw: Bluetooth
 Soft blocked: no
 Hard blocked: no
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
5: hci0: Bluetooth
 Soft blocked: yes
 Hard blocked: no

Try:

echo "options iwl3945 disable_hw_scan=1" | sudo tee /etc/modprobe.d/iwl3945fix.conf

Reboot to test

okay thank you
i'll try it out. and let you know if solved the problem

Hello Andrew
this did not solve the problem. it just happened again.

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