NM sometimes disables Wi-Fi interface and the only way to re-enable it is to delete NetworkManager.state and reboot

Binary package hint: network-manager

Problem in most cases is result of. failure in suspend/hibernate. After such knetworkmanager says "network management is disabled", wlan0 interface has txpower set to off, can't change.Problem is in /var/lib/NetworkManager/NetworkManager.state of form:
[main]
NetworkingEnabled=true
WirelessEnabled=false
WWANEnabled=false

if I change manually WirelessEnabled to true and restart network-manager it reverts to false.
Even if I manually stop /etc/init.d/networking and network-manager, kill kdm for a while, change entry after starting network-manager it reverts to false. I must do full reboot after deleting this file to recover wifi in my laptop.

I don't have idea what keeps those settings, but for me it is a bug, reenabling should be as easy as clicking enable in knetworkmanager plasma applet or better autodetect if there was suspend/resume failure to revert those settings during boot.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: network-manager 0.8-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Thu May 20 14:06:33 2010
Gconf:

IpRoute:
 157.158.166.0/23 dev wlan0 proto kernel scope link src 157.158.167.9 metric 2
 169.254.0.0/16 dev wlan0 scope link metric 1000
 default via 157.158.167.253 dev wlan0 proto static
Keyfiles: Error: [Errno 2] No such file or directory
ProcEnviron:
 LANGUAGE=
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
WpaSupplicantLog: