Solucionando el problema con la red wireless en Ubuntu 12.04:
esteban@laptop:~$ lspci
10:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
esteban@laptop:~$
En terminal verificamos con:
esteban@laptop:~$ dmesg | grep -i iwl3945
Nos regresara algo como esto:
iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, 1.2.0
iwl3945: Copyright(c) 2003-2007 Intel Corporation
Detected Intel PRO/Wireless 3945BG Network Connection
iwl3945: Tunable channels: 13 802.11bg, 0 802.11a channels
wmaster0: Selected rate control algorithm ‘iwl-3945-rs’
iwl3945: Microcode SW error detected. Restarting 0×82000008.
iwl3945: Error Reply type 0×00000005 cmd REPLY_SCAN_CMD (0×80) seq 0×4418 ser 0x0000004B
iwl3945: Can’t stop Rx DMA.
Seguimos desde terminal:
esteban@laptop:~$ sudo su
esteban@laptop:~$ echo alias wlan0 iwl3945>/etc/modprobe.d/iwl3945
esteban@laptop:~$ echo options iwl3945 disable_hw_scan=1>>/etc/modprobe.d/iwl3945
esteban@laptop:~$ modprobe -r iwl3945
Conectado a internet:
esteban@laptop:~$ sudo apt-get install linux-backports-modules-hardy-generic
Por ultimo:
reboot