How to determine which video card driver to use?

[Josef Lowder]

.
On my flat panel monitor (Sony model SDM HS93) the screen is 
way "too bright."  I have tried every setting possible to turn 
down the brightness, but without success. 

Now, I wonder if the problem may be that I am using the wrong 
video driver setting.  But I don't know how to determine what 
driver I should be using.  The system's hardware detection 
displays the following: 

Graphic card: S3 86C375 (VIRGE/DX)

Identification: Vendor: S3 Inc.
Description: ViRGE/DX or /GX
Media class: DISPLAY_VGA
Connection: Bus: PCI
Bus PCI #: 0
PCI device #: 12
PCI function #: 0
Vendor ID: 21299
Device ID: 35329
Sub vendor ID: 65535
Sub device ID: 65535
Misc Module: Card:S3 ViRGE (generic)

When I run the config tool, under "Choose an X server" 
it lists these options: 

Virge (generic)
Virge (old S3V server)
Virge/DX (generic)
Virge/GX (generic)
Virge/GX2 (generic)
Virge/MX (generic)
Virge/MX+ (generic)
Virge/VX (generic)

I'm wondering if I should dry a different driver, perhaps the 
Virge (old S3V server) or something else ... or is it risky to 
experiment with trying different drivers? 

I've searched the 'net, but can't find any information on what 
the differences are in these different drivers or which one 
might work better with the Sony flat panel monitor. 

How can I solve this "too bright" issue?