I upgraded my "vista capable" Sony Vaio laptop to Vista RTM (official
release). Now, in both Media Center 2005 that came with the laptop AND Vista
RTM I'm running now, there is no option to reduce gamma. This is rather
strange because the Intel graphic accelerator does not give you the option to
reduce below 1.0. My screen is too bright and I have zero option to adjust
the display contrast, gamma, brightness. How do I fix this problem?

Info from dxdiag:


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System Information
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Time of this report: 11/30/2006, 17:02:10
Operating System: Windows Vistaâ„¢ Ultimate (6.0, Build 6000)
(6000.vista_rtm.061101-2205)
Language: English (Regional Setting: English)
System Manufacturer: Sony Corporation
System Model: VGN-FE770G
BIOS: Phoenix NoteBIOS 4.0 Release 6.1
Processor: Intel(R) Core(TM)2 CPU T5600 @ 1.83GHz (2
CPUs), ~1.8GHz
Memory: 2038MB RAM
Page File: 1149MB used, 3147MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10

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Display Devices
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Card name: Mobile Intel(R) 945GM Express Chipset Controller 0
(Microsoft Corporation - WDDM)
Manufacturer: Intel Corporation
Chip type: Intel(R) GMA 950
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_27A2&SUBSYS_81EF104D&REV_03
Display Memory: 256 MB
Dedicated Memory: 0 MB
Shared Memory: 256 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: igdumd32.dll
Driver Version: 7.14.0010.1103 (English)
DDI Version: 9Ex