Valeu turma... mas continuo sem sucesso.
Pelo meu GRUB selecionei o -desktop do kernel antigo e mesmo assim nada. A luz não acende, o networkmanager só reconhece a rede com fio, nem ao menos tenta escanear uma rede wireless...
Fazendo uma pesquisa no /var/log/messages achei isso:
Feb 17 10:22:35 lobstermovelos kernel: [ 6258.386314] ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 17 10:22:42 lobstermovelos kernel: [ 6265.498103] b43-phy0 ERROR: Fatal DMA error: 0x00000800, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
Feb 17 10:22:42 lobstermovelos kernel: [ 6265.498138] b43-phy0: Controller RESET (DMA error) ...
Feb 17 10:22:42 lobstermovelos kernel: [ 6265.668333] b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
Feb 17 10:22:44 lobstermovelos kernel: [ 6267.062309] b43-phy0: Controller restarted
Feb 17 10:22:44 lobstermovelos kernel: [ 6267.062337] b43-phy0 ERROR: Fatal DMA error: 0x00000400, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
Feb 17 10:22:44 lobstermovelos kernel: [ 6267.062367] b43-phy0: Controller RESET (DMA error) ...
Feb 17 10:22:44 lobstermovelos kernel: [ 6267.230350] b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23)
Feb 17 10:22:45 lobstermovelos kernel: [ 6268.638280] b43-phy0: Controller restarted
Feb 17 10:22:45 lobstermovelos kernel: [ 6268.638309] b43-phy0 ERROR: Fatal DMA error: 0x00000400, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
Feb 17 10:22:45 lobstermovelos kernel: [ 6268.638340] b43-phy0: Controller RESET (DMA error) ...
e aí? é grave?