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[ubuntu] Ubuntu Koala - no wireless networks showing

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http://ubuntuforums.org – I have been working on this problem for a while but might be narrowing the options. This is an HP laptop running Ubuntu Koala. Until last week, the wireless had been working perfectly but suddenly it lost the wireless connection (to a Bell modem/wireless router) and all local wireless networks had disappeared. These two command listings below may hold a key but I know nothing about wireless and not much about Ubuntu. What seems odd is that "lshw" shows the wireless interface as logical name "wmaster0" but the iwconfig shows a "wlan1" as the wireless. The ethernet wired interface shows as "eth1" on both commands. Could this be causing the problem. Also, I was wondering what the "ACPI handle has no context" means. garry@garry-laptop:~$ sudo lshw -C network *-network DISABLED description: Wireless interface product: PRO/Wireless 3945ABG [Golan] Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wmaster0 version: 02 serial: 00:1c:bf:27:05:f2 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list logical ethernet physical wireless configuration: broadcast=yes driver=iwl3945 latency=0 multicast=yes wireless=IEEE 802.11abg resources: irq:30 memory:f4000000-f4000fff *-network description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:08:00.0 logical name: eth1 version: 01 serial: 00:1b:24:c3:78:94 size: 10MB/s capacity: 100MB/s width: 64 bits clock: 33MHz capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10MB/s resources: irq:29 ioport:c000(size=256) memory:f8200000-f8200fff memory:80000000-8001ffff(prefetchable) garry@garry-laptop:~$ sudo iwconfig lo no wireless extensions. eth1 no wireless extensions. wmaster0 no wireless extensions. wlan1 IEEE 802.11abg ESSID:"" Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated Tx-Power=off Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 ------------------------------------------------------------- dmesg shows wireless sleeping: [ 1841.389051] ACPI handle has no context! [ 1841.390127] ACPI handle has no context! [ 1841.390134] sdhci-pci 0000:09:09.1: PME# disabled [ 1841.390142] sdhci-pci 0000:09:09.1: PCI INT B disabled [ 1841.390150] ACPI handle has no context! [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.428465] iwl3945 0000:02:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x000003C8 [ 1841.664647] iwl3945 0000:02:00.0: Microcode HW error detected. Restarting. [ 1841.884726] ata_piix 0000:00:1f.1: PCI INT A disabled [ 1841.988595] HDA Intel 0000:00:1b.0: PCI INT A disabled (HowTos)