When you start a Windows Vista-based computer or a Windows Server 2008-based computer, the computer stops responding on blank screen. This problem occurs when the computer has a VGA driver installed.

On a Windows Vista-based portable computer, you use a VGA cable to connect an external display. For example, you connect a monitor, a projector, or a television to the portable computer. The screen may flash when you connect the external display or when you use the external display. This problem occurs if one of the following conditions is true:

• The VGA cable is long.
• Multiple VGA cables are connected to one another.
• The VGA cable does not have effective electromagnetic shielding.

The information in this article applies to the following configuration(s):

• FireMV Display Driver 8.253
• FireMV 2400 PCI
• FireMV 2400 PCIE
• Windows Vista 32bit Edition
• Windows Vista 64bit Edition
• Windows XP Professional
• Windows XP Home Edition
• Windows 2000 Professional

Symptoms:
When the FireMV 2400 PCI or PCIE is installed in a system with an Intel Core 2 Duo processor, the system stalls at the windows loading screen after the FireMV 8.253 drivers are installed.

The problem does NOT occur when Windows drivers (Standard VGA) are installed.

This behaviour has been noted with multiple FireMV 2200 configurations. A single FireMV 2200 card works in systems with Intel Core 2 Duo-Processors.

The information in this article applies to the following configuration(s):

• Radeon® X1900 series
• Radeon® X1800 series
• Radeon® X1600 series
• Radeon® X1300 series
• Windows Vista 32bit
• Windows Vista 64bit
• Windows XP Professional
• Windows XP Home Edition
• Windows XP Media Center Edition
• Windows XP Professional x64 Edition
• Windows 2000 Professional
• SONY KLV-S32A10 LCD TV
• PRIMA LC32U5 LCD TV

Symptoms:
With above mentioned LCD TVs the resolution 1366×768 is not available through DVI or HDMI. However through VGA connection the resolution is available.

Other LCD TVs and Radeon cards might be affected.