我的笔记本电脑内置有 WiFi 适配器（5 年前制造）。最新的（5 年前）Windows 驱动程序允许它使用 WPA。
我正在使用 Lubuntu 10.10，但它只允许我使用 WEP（Ubuntu 10.04 的情况相同）。有办法解决这个问题吗？
UPD：硬件信息
:~$ lspci
00:00.0 Host bridge: Transmeta Corporation LongRun Northbridge (rev 03)
00:00.1 RAM memory: Transmeta Corporation SDRAM controller
00:00.2 RAM memory: Transmeta Corporation BIOS scratchpad
00:03.0 Modem: ALi Corporation M5457 AC'97 Modem Controller
00:04.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link Controller Audio Device (rev 02)
00:07.0 ISA bridge: ALi Corporation M1533/M1535/M1543 PCI to ISA Bridge [Aladdin IV/V/V+]
00:09.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
00:0b.0 USB Controller: NEC Corporation USB (rev 43)
00:0b.1 USB Controller: NEC Corporation USB (rev 43)
00:0b.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
00:0c.0 CardBus bridge: Texas Instruments PCI4510 PC card Cardbus Controller (rev 02)
00:0c.1 FireWire (IEEE 1394): Texas Instruments PCI4510 IEEE-1394 Controller
00:0f.0 IDE interface: ALi Corporation M5229 IDE (rev c4)
00:11.0 Bridge: ALi Corporation M7101 Power Management Controller [PMU]
:~$ lsusb
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 124a:168b AirVast PRISM3 WLAN Adapter
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 2001:3c00 D-Link Corp. [hex] AirPlus G DWL-G122 Wireless Adapter(rev.B1) [Ralink RT2500USB]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
问题在于总线 002 设备 002：ID 124a:168b AirVast PRISM3 WLAN 适配器。
D-Link 是外置 USB，工作良好。我用它来上网。
更新 2：
:~$ lsmod
Module Size Used by
prism2_usb 160970 0
arc4 1165 2
rt2500usb 18049 0
rt2x00usb 9779 1 rt2500usb
rt2x00lib 27275 2 rt2500usb,rt2x00usb
led_class 2633 1 rt2x00lib
mac80211 231541 2 rt2x00usb,rt2x00lib
cfg80211 144470 2 rt2x00lib,mac80211
psmouse 59033 0
parport_pc 26058 0
dm_crypt 11385 0
ppdev 5556 0
snd_ali5451 15875 1
snd_ac97_codec 99227 1 snd_ali5451
ac97_bus 1014 1 snd_ac97_codec
snd_pcm 71475 2 snd_ali5451,snd_ac97_codec
snd_seq_midi 4588 0
snd_rawmidi 17783 1 snd_seq_midi
snd_seq_midi_event 6047 1 snd_seq_midi
snd_seq 47174 2 snd_seq_midi,snd_seq_midi_event
snd_timer 19067 2 snd_pcm,snd_seq
snd_seq_device 5744 3 snd_seq_midi,snd_rawmidi,snd_seq
pcmcia 35973 0
snd 49006 9 snd_ali5451,snd_ac97_codec,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
yenta_socket 21518 0
pcmcia_rsrc 10566 1 yenta_socket
i2c_ali15x3 5190 0
serio_raw 4022 0
pcmcia_core 14657 3 pcmcia,yenta_socket,pcmcia_rsrc
i2c_ali1535 4865 0
soundcore 880 1 snd
snd_page_alloc 7120 1 snd_pcm
lp 7342 0
parport 31492 3 parport_pc,ppdev,lp
dm_raid45 81721 0
xor 15136 1 dm_raid45
radeon 825934 2
ttm 56633 1 radeon
drm_kms_helper 30200 1 radeon
drm 168054 4 radeon,ttm,drm_kms_helper
8139too 19581 0
video 18712 0
firewire_ohci 21106 0
efficeon_agp 4794 0
8139cp 16934 0
output 1883 1 video
pata_ali 7976 2
firewire_core 46643 1 firewire_ohci
agpgart 32011 3 ttm,drm,efficeon_agp
mii 4425 2 8139too,8139cp
i2c_algo_bit 5168 1 radeon
crc_itu_t 1383 1 firewire_core
UPD 3：是否有支持 WPA 的兼容驱动程序？