nenhuma conexão no notebook toshiba satellite

[achteutis]

Olá a todos.
preciso da ajuda do pessoal a respeito da conexão de um notebook com a internet. comprei um toshiba satellite e ele não conecta à internet de jeito nenhum. a saída do comando lspci é:

00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 03)

00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 03)

00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 03)

00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)

00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)

00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)

00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)

00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)

00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)

00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 (rev 03)

00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 (rev 03)

00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 03)

00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 03)

00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)

00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)

00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)

00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)

00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)

00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)

00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)

00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA AHCI Controller (rev 03)

00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)

07:00.0 Ethernet controller: Marvell Technology Group Ltd. Unknown device 4355 (rev 12)

08:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)

0a:01.0 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)

0a:01.2 SD Host controller: O2 Micro, Inc. Integrated MMC/SD Controller (rev 02)

0a:01.3 Mass storage controller: O2 Micro, Inc. Integrated MS/xD Controller (rev 01)

outra coisa: quando acesso "sistema > administração > rede" a opção "modo de roaming habilitado" nao aparece. já pesquisei aqui no fórum e não achei nenhum caso parecido com o meu. ainda nem testei o wireless, por enquanto estou preocupado com a conexão a cabo.

desde já agradeço.



andei pesquisando e to estranhando cada vez mais. parece que o sistema não reconheceu o dispositivo ethernet:

07:00.0 Ethernet controller: Marvell Technology Group Ltd. Unknown device 4355 (rev 12)

alguém pode dar uma luz? to realmente perdido...