You may receive a Stop error message that resembles one of the following after you resume a computer from sleep or from hibernation:

Error message 1:

STOP 127 PAGE_NOT_ZERO_NVIDIA_USB

This error occurs on a computer that uses 2 gigabytes (GB) or more of RAM and an nVidia nForce EHCI controller.

Error message 2:

STOP 0×1000007E usbhub.sys SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

This error occurs because of a race condition in the Usbhub.sys driver. This condition occurs if a USB device driver tries to enter a selective suspend state when a previously canceled selective suspend request has not yet been fully processed.

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

• Windows Vista 32 or 64 bit
• Catalyst Display Driver 7.1 for Vista
• Radeon® X1950 AGP series
• Radeon® X1600 AGP series
• Radeon® X1300 AGP series
• Radeon® X850 series
• Radeon® X800 series
• Radeon® X700 series
• Radeon® X600 series
• Radeon® X550 series
• Radeon® X300 series
• Radeon® 9800 series
• Radeon® 9700 series
• Radeon® 9650/9600 series
• Radeon® 9550/9500 series

Symptoms
Attempting to install the graphics driver on a system containing an NVidia NF3 chipset and an ATI AGP graphics adapter may result in the driver failing to install and the 3D engine not activating.

In Windows Vista 32bit or 64bit versions, the Device Manager will show a (!) mark and the AGP card will operate in PCI mode only.  When the properties of the device are shown, the error code will show as code 43.

This issue has been seen with other AGP chipsets such as VIA and SiS but has since been resolved by chipset driver updates from these manufacturers.

AMD’s AGP adapters require correctly functioning AGP support from the operating system in order to run the WDDM driver under Vista. This WDDM driver has no way of working around the absence of AGP support.