Problema wifi con Acer 1670

Buonasera, ho installato Xubuntu su un Acer Aspire 1670, pentium 4. Sono poco pratico, ma mi sembra che tutto funzioni bene tranne il collegamento wifi. Navigo solo col cavo. Il tasto del wifi si accende, ma non succede nulla. Se lancio Wifi Radar mi da questo messaggio di errore: Device not found. Ho provato a leggere le risposte a domande simili, ma non sono riuscito a ottenere risultati. Ho postato sul terminale un paio di comandi che danno queste informazioni:

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS300 Host Bridge (rev 02)
00:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS300 AGP Bridge
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] OHCI USB Controller #1 (rev 01)
00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] OHCI USB Controller #2 (rev 01)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] EHCI USB Controller (rev 01)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SMBus (rev 1a)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] Dual Channel Bus Master PCI IDE Controller
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] Device 434c
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] IXP200 3COM 3C920B Ethernet Controller
00:14.5 Multimedia audio controller: Advanced Micro Devices, Inc. [AMD/ATI] IXP150 AC'97 Audio Controller (rev 01)
00:14.6 Modem: Advanced Micro Devices, Inc. [AMD/ATI] IXP AC'97 Modem (rev 01)
01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350/M10 [Mobility Radeon 9600 PRO Turbo]
02:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev 80)
02:02.0 Ethernet controller: InProComm Inc. IPN 2220 802.11g
02:03.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 10)
02:04.0 CardBus bridge: ENE Technology Inc CB-710/2/4 Cardbus Controller
02:04.1 FLASH memory: ENE Technology Inc ENE PCI Memory Stick Card Reader Controller
02:04.2 SD Host controller: ENE Technology Inc ENE PCI Secure Digital Card Reader Controller
02:04.3 FLASH memory: ENE Technology Inc FLASH memory: ENE Technology Inc:
ste@ste-Aspire-1670:~$ lspci -vnn | grep -i net
00:14.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] IXP200 3COM 3C920B Ethernet Controller [1002:4342] (prog-if 01 [Subtractive decode])
02:02.0 Ethernet controller [0200]: InProComm Inc. IPN 2220 802.11g [17fe:2220]
02:03.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter [10ec:8139] (rev 10)

sudo lshw -C network
  *-network:0 UNCLAIMED   
       description: Ethernet controller
       product: IPN 2220 802.11g
       vendor: InProComm Inc.
       physical id: 2
       bus info: pci@0000:02:02.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list
       configuration: latency=64 maxlatency=32 mingnt=32
       resources: ioport:a480(size=32) memory:e8201000-e820101f memory:e8200800-e8200fff
  *-network:1
       description: Ethernet interface
       product: RTL-8100/8101L/8139 PCI Fast Ethernet Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 3
       bus info: pci@0000:02:03.0
       logical name: eth0
       version: 10
       serial: 00:0f:b0:5f:2a:8d
       size: 10Mbit/s
       capacity: 100Mbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=half latency=128 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10Mbit/s
       resources: irq:19 ioport:a000(size=256) memory:e8201400-e82014ff

Io non me ne intendo, ma è come se si fosse staccato il collegamento col dispositivo wifi?
Qualcuno sa darmi istruzioni su come procedere? Grazie mille !!