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

• Quake 3
• Quake 4
• Radeonâ„¢ HD 2400 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition
• Windows XP Professional
• Windows XP Home Edition
• Windows XP Media Center Edition
• Windows XP Professional x64 Edition

Symptoms:
Quake 3 and 4: Resuming from a standby state results in the display image appearing too bright

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

• Catalyst Control Center
• Radeonâ„¢ X850 series
• Radeonâ„¢ X800 series
• Windows Vista 32bit Edition
• Windows Vista 64bit Edition
• Windows XP Professional
• Windows XP Home Edition
• Windows XP Media Center Edition
• Windows XP Professional x64 Edition
• Windows 2000 Professional

Symptoms:

Catalyst Control Center: The Apply button is greyed out when making adjustments to the Brightness, Contrast, or Saturation sliders in the “Adjustments” under “Component Video Propertie”

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

• Catalyst Vista RTM driver
• Radeon® X1600 series
• Radeon® X1300 series
• Windows Vista 32bit Edition
• Windows Vista 64bit Edition

Symptoms
On some configurations, the red gamma, brightness, and contrast settings are not retained after restarting the operating system.

Open Catalyst Control Center and go to the Color settings. For the Red color, change the gamma, brightness, and contrasting settings to its maximum value. Apply the settings, click OK, and exit Catalyst Control Center. Users might find that the color settings are not retained after restarting the operating system.

When a Windows Vista-based computer resumes from a low-power sleep state, the display brightness may change.

This problem occurs if one of the following conditions is true:

• You temporarily change the display brightness before you put the computer to sleep by using Windows Mobility Center or by using function hotkeys on a mobile computer. Windows Vista stores a brightness preference in power policy and reapplies that preference every time that the system resumes from a low-power sleep state, such as sleep or hybrid sleep.
• The computer BIOS change the display brightness when the system resumes from sleep.