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WIN32K_CALLOUT_WATCHDOG_LIVEDUMP
WIN32K_CALLOUT_WATCHDOG_LIVEDUMP is live dump code 0x1A1. Microsoft states that a callout to Win32k did not return promptly and, critically, that this code can never be used for a real bug check; it identifies live dumps. Parameter 1 is the thread blocking prompt return from the callout, while parameters 2 through 4 are reserved.
Do not report a 0x1A1 dump as a blue-screen stop
Kernel live dumps capture memory for an abnormal condition while allowing the operating system to continue. That lifecycle is the key difference from WIN32K_CALLOUT_WATCHDOG_BUGCHECK (0x1A2), the related stop-code value. Incident tooling should retain the dump type as well as the numeric code.
Analyze the blocking thread
- Use parameter 1 as the thread address and inspect it with WinDbg thread commands.
- Review the stack and wait state to see what prevents prompt return from the Win32k callout.
- Leave parameters 2, 3, and 4 uninterpreted unless build-specific debugger output provides separate evidence.
References
- Microsoft: 0x1A1 WIN32K_CALLOUT_WATCHDOG_LIVEDUMP
- Microsoft: kernel live dump code reference
- Microsoft: related 0x1A2 bug check
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