Como instalar vídeo em Positivo mobile Z510??

Bom dia, estou com um notebook Positivo Mobile Z510. Instalei Ubuntu 9.04 nele. Detectou automaticamente: áudio, wireless, rede.
Mas falta vídeo.

Eu procurei o hardware com um programa de rastreio o HWinfo32, e ele mostrou o seguinte: [só nao achei a webcam]
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General Information
Processor Name: Intel Celeron 570
Original Processor Freqency: 2266.7 MHz

CPU ID: 00010661
CPU Brand Name: Intel(R) Celeron(R) CPU 570 @ 2.26GHz
CPU Vendor: GenuineIntel
CPU Stepping: A1
CPU Code Name: Merom-L
CPU QDF: QVSI
CPU S-Spec: SLA2C
CPU Thermal Design Power (TDP): 27 W
CPU Platform: Socket P mPGA478 (Micro-FCPGA)
Microcode Update Revision: 33

Number of CPU Cores: 1
Number of Logical CPUs: 1


Computer Brand Name: Positivo Positivo Mobile

Motherboard Model: clevo M540SS
Motherboard Chipset: SiS 671/672 + 968
Motherboard Slots: 2xPCI, 1xAGP v3.5 , 2xPCI Express x1, 1xPCI Express x16
BIOS
BIOS Manufacturer: Phoenix Technologies
BIOS Date: 03/19/09
BIOS Version: 6.00

General information
Total Memory Size: 1 GBytes

Current Performance Settings
Current Memory Clock: 333.2 MHz (5 : 2 ratio)
Current Timing (tCAS-tRCD-tRP-tRAS): 5.0-5-5-15

Video chipset
Video Chipset: SiS6351 Mirage 3 Graphics
Video Memory: 64 MBytes

Video Card
Video Card: SiS 6351 Mirage 3 Graphics Video Adapter [CLEVO/KAPOK COMPUTER]
Video Bus: AGP 8X
Video RAMDAC: Internal
Video BIOS Version: Unknown
General Module Information
Module Number: 0
Module Size: 1024 MBytes
Memory Type: DDR2-SDRAM
DIMM Type: SO-DIMM
Error Check/Correction: None
Memory Speed: 400.0 MHz (PC2-6400)
Module Manufacturer: Smart Modular
Module Model: SG564283FG8NWKFSQR
Serial Number: 4069492
Manufacturing Date: N/A

General information
Monitor Name: Chi Mei N141I3-L02
Serial Number: Unknown
Date Of Manufacture: Week: 45, Year: 2006

General Information
Drive Controller: Serial ATA 3Gb/s
Drive Model: Seagate ST9160314AS
Drive Revision: 0001SDM1
Drive Serial Number: 5VC1FJ6M
Drive Capacity: 152,627 MBytes (160 GB)
General information
Drive Model: TSSTcorp CDDVDW TS-L633A
Drive Revision: TM00
Serial Number: TS-L633AFirmware
Device Type: DVD+R DL

Audio Adapter: SiS High Definition Audio Controller
High Definition Audio Codec: RealTek ALC883

General information
Network Card: SiS191 Ethernet Controller
Vendor Description: SiS
MAC Address: 00-90-F5-76-86-34

Driver Description: Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter

General Properties
Device Name: BAT1
Manufacturer Name: NOTEBOOK
Unique ID: 0001NOTEBOOKBAT1
Chemistry: Lithium Ion
Designed Capacity: 48840 mWh
Full Charged Capacity: 48052 mWh
Wear Level: 1.6 %

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Alguém tem alguma dica?