NM doesn't show available Wi-Fi networks at startup; switching off and on hard rfkill switch fixes it -- Intel PRO/Wireless 4965 iwl4965

[Teo]

Starting from recently, almost every time I reboot (or is it _every_ time I reboot? not sure), network manager doesn't show available wireless networks. If I click on the icon I see only:
-"Enable networking" (checked)
-"Enable wireless" (checked)
-Edit connections

I wait for several minutes, close and reopen the dropdown menu again and again to give it an opportunity to "refresh", but nothing.

My workaround is to switch off and on the HARDWARE switch that my laptop has for wireless and bluetooth. That "wakes up" Network Manager which then gets the list of available networks.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu10
Architecture: i386
CRDA:
 country ES:
  (2402 - 2482 @ 40), (N/A, 20)
  (5170 - 5250 @ 40), (N/A, 20)
  (5250 - 5330 @ 40), (N/A, 20), DFS
  (5490 - 5710 @ 40), (N/A, 27), DFS
Date: Sun Jun 24 17:59:16 2012
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
IpRoute:
 default via 192.168.1.1 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.54 metric 2
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to precise on 2012-05-17 (38 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.4.0 connected enabled enabled enabled enabled disabled

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Thomas Hood (jdthood)]

Compare bug #274405.