This problem started after upgrading to 12.04, an my system is 'up2date'

Have tried most of the solution-proposals found on the net.

lspci -nnk | grep -iA2 net 00:19.0 Ethernet controller [0200]: Intel Corporation 82567LF Gigabit Network Connection [8086:10bf] (rev 03) Subsystem: Lenovo Device [17aa:20ee]

Kernel driver in use: e1000e

03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection [8086:4237] Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1211] Kernel driver in use: iwlagn

iwconfig

lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11abgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off

sudo lshw -C network *-network
description: Ethernet interface product: 82567LF Gigabit Network Connection vendor: Intel Corporation physical id: 19 bus info: pci@0000:00:19.0 logical name: eth0 version: 03 serial: 00:22:68:1a:c4:75 size: 100Mbit/s capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.0.2-k2 duplex=full firmware=1.8-3 ip=192.168.2.154 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:29 memory:fc000000-fc01ffff memory:fc024000-fc024fff ioport:1820(size=32)
*-network DISABLED
description: Wireless interface
product: PRO/Wireless 5100 AGN [Shiloh] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 00
serial: 00:26:c6:6c:2d:24
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn latency=0 multicast=yes wireless=IEEE 802.11abgn
resources: irq:30 memory:f4300000-f4301fff

Please help

Br/VB