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AGP_INVALID_ACCESS
AGP aperture access violation for AGP_INVALID_ACCESS
AGP_INVALID_ACCESS is bug check code 0x00000104. This legacy graphics/platform bug check belongs to the AGP era. It points to invalid access through the graphics aperture or address-translation path used by AGP display hardware and drivers.
How to read it in a dump
- The failing driver is likely a display miniport, chipset, or AGP filter component on older systems.
- AGP aperture configuration, GART mappings, and firmware/chipset settings are the key context.
- Do not treat it as a modern DXGK TDR code; it is a bus/aperture mapping failure.
What to check
- Check the display driver, chipset/AGP driver, BIOS AGP aperture settings, and hardware stability.
- Look for memory corruption near graphics mappings.
- On modern systems, confirm that the code is not from a virtualized or compatibility environment.
References
Dump evidence
Preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. AllStat summarizes the condition as “An invalid AGP memory access was detected.”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.
Analysis order
- Run WinDbg
!analyze -v, then inspect the documented meaning of each parameter instead of relying only on the probably-caused-by line. - find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with agp / access.
- keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Do not repeatedly reboot a machine affected by this result before collecting the dump and event logs. Recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.
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