Veja pelo terminal, com o comando
lspci qual o chip da sua placa:
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 90)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8251 PCI to ISA Bridge
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 70)
00:11.7 Host bridge: VIA Technologies, Inc. VT8251 Ultra VLINK Controller
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 7c)
00:13.0 PCI bridge: VIA Technologies, Inc. VT8251 Host Bridge
Tente ver qual é o chipset da sua placa, no terminal, com o comando
lspci00:13.1 PCI bridge: VIA Technologies, Inc. VT8251 PCI to PCI Bridge
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:00.0 VGA compatible controller: VIA Technologies, Inc. S3 Unichrome Pro VGA Adapter (rev 01)
02:00.0 PCI bridge: VIA Technologies, Inc. VT8251 PCIE Root Port
02:00.1 PCI bridge: VIA Technologies, Inc. VT8251 PCIE Root Port
05:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
05:0c.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
No meu caso é esse em negrito (PixelView Play TV Pro Ultra).
Veja esse link do Guia do Harware:
http://www.guiadohardware.net/guias/07/index5.phpE mais esses aqui do Fórum:
http://ubuntuforum-pt.org/index.php?topic=10895.0http://ubuntuforum-pt.org/index.php?topic=10895.0Se vc não resolver pelo menos vai avançar...
Boa sorte.