Na hora em que você compilou o módulo, havia algum outro módulo carregado que resolvia esses símbolos. Resta descobrir qual era...
olha cara, logo que eu pluguei a antena na porta usb o sistema reconheceu a placa 802.11 USB Wireless LAN Card, no entanto ele não capta nenhum ESSID disponível, ou seja, a placa é visível no network manager do ubuntu (juntamente com a integrada, Atheros AR5B93 que "enxerga" as redes), no entanto não é possível fazer conexão por ela, não aparece nenhuma rede disponivel pra ela. achei que pudesse ser o driver e por isso fiz como mencionado acima. eu estou conectado agora usando uma maquina virtual rodando o win xp, já que no sistema nativo que eu uso (windows 7) tambem estou enfrentando o mesmo problema. eu tenho o cd original da placa com o driver que aparece a seguinte situação ao compilar: será que isso ajudaria?
root@user-laptop:/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0# make
make -C tools
make[1]: Entrando no diretório `/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/tools'
gcc -g bin2h.c -o bin2h
make[1]: Saindo do diretório `/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/tools'
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/tools/bin2h
cp -f os/linux/Makefile.6 /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/Makefile
make -C /lib/modules/2.6.31-20-generic/build SUBDIRS=/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux modules
make[1]: Entrando no diretório `/usr/src/linux-headers-2.6.31-20-generic'
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/crypt_md5.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/crypt_sha2.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/crypt_hmac.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/mlme.o
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/mlme.c: In function ‘BssTableSortByRssi’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/mlme.c:4691: warning: the frame size of 1572 bytes is larger than 1024 bytes
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_wep.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/action.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_data.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/rtmp_init.o
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/rtmp_init.c: In function ‘RtmpRaDevCtrlInit’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/rtmp_init.c:4499: warning: passing argument 2 of ‘os_alloc_mem’ from incompatible pointer type
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/include/rtmp.h:6246: note: expected ‘UCHAR **’ but argument is of type ‘UCHAR *’
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_tkip.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_aes.o
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_aes.c: In function ‘AES_GTK_KEY_WRAP’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_aes.c:1371: warning: the frame size of 1092 bytes is larger than 1024 bytes
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_sync.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/eeprom.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_sanity.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_info.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_cfg.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_wpa.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/dfs.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/spectrum.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/rtmp_timer.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/rt_channel.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_profile.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../common/cmm_asic.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/assoc.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/auth.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/auth_rsp.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.o
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c: In function ‘PeerBeaconAtScanAction’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c:684: warning: the frame size of 1244 bytes is larger than 1024 bytes
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c: In function ‘PeerBeacon’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c:1484: warning: the frame size of 1312 bytes is larger than 1024 bytes
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c: In function ‘PeerBeaconAtJoinAction’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c:962: warning: the frame size of 1256 bytes is larger than 1024 bytes
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c: In function ‘MlmeStartReqAction’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sync.c:558: warning: the frame size of 1064 bytes is larger than 1024 bytes
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/sanity.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/rtmp_data.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/connect.o
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/connect.c: In function ‘LinkDown’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/connect.c:2095: warning: unused variable ‘Cancelled’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/connect.c: In function ‘CntlOidScanProc’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/connect.c:332: warning: the frame size of 1600 bytes is larger than 1024 bytes
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../sta/wpa.o
CC [M] /home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.o
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c: In function ‘RtmpOSNetDevAddrSet’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1392: error: ‘struct net_device’ has no member named ‘priv’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c: In function ‘RtmpOSNetDevAttach’:
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1585: error: ‘struct net_device’ has no member named ‘priv’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1587: error: ‘struct net_device’ has no member named ‘open’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1588: error: ‘struct net_device’ has no member named ‘stop’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1589: error: ‘struct net_device’ has no member named ‘hard_start_xmit’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1590: error: ‘struct net_device’ has no member named ‘do_ioctl’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1596: error: ‘struct net_device’ has no member named ‘get_stats’
/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.c:1630: error: ‘struct net_device’ has no member named ‘validate_addr’
make[2]: ** [/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux/../../os/linux/rt_linux.o] Erro 1
make[1]: ** [_module_/home/user/Downloads/2009_0416_RT2070_Linux_STA_v2.1.0.0/os/linux] Erro 2
make[1]: Saindo do diretório `/usr/src/linux-headers-2.6.31-20-generic'
make: ** [LINUX] Erro 2