Knowledge

ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT - 585 (0x249)

The system BIOS failed to connect a system interrupt to the device or bus for which the device is connected.

Updated: Feb 21, 2026

Technical Background

The ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT is a specific error code indicating that the BIOS failed to properly configure an interrupt for a device or bus. This typically occurs during system initialization when the BIOS attempts to establish communication with hardware components.

Error Details

  • Error Name: ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT
  • Numeric Code: 585 (0x249)
  • Short Description: The system BIOS failed to connect a system interrupt to the device or bus for which the device is connected.

This error suggests that there was an issue during the initialization process where the BIOS could not correctly map interrupts to the appropriate hardware components. Interrupts are crucial for enabling efficient communication between the CPU and peripheral devices, so their proper configuration is essential for system stability and functionality.

Common Causes

  • Invalid Parameter Values: Incorrect or invalid parameters provided by the device driver or BIOS during initialization.
  • Incorrect Object Type: The object type being initialized does not match the expected type, leading to a mismatch in interrupt handling.
  • Exceeding Limits: The system may have reached its limit for the number of interrupts that can be assigned.
  • Corrupted Data: Corrupted BIOS or device driver data affecting the initialization process.
  • Unsupported Operations: Attempting to initialize hardware that is not supported by the current BIOS version.

Real-World Context

This error typically occurs during system startup, often leading to a failure in initializing specific hardware components. It can result in system instability, reduced performance, or even complete system lockup if critical interrupts are not properly configured.

Is This Error Critical?

Yes, this error is critical as it directly impacts the ability of the system to communicate with certain hardware components. Without proper interrupt configuration, devices may fail to function correctly, leading to potential data loss or system crashes.

How to Diagnose

To diagnose ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT, follow these steps:

  1. Review Operation Context: Check the BIOS settings and ensure that all necessary hardware components are properly configured.
  2. Validate Parameters: Verify that device drivers and BIOS parameters are correct and up-to-date.
  3. Confirm Object Types: Ensure that the object types being initialized match the expected types for the devices in question.
  4. Verify Input Data: Check for any corrupted data, such as BIOS or device driver files, which could be causing the issue.
  5. Check Limits or Constraints: Confirm that the system has not exceeded its limits for interrupt assignments.

How to Resolve

To resolve ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT, consider these practical steps:

  • Correct Parameter Usage: Ensure all parameters are correctly set and up-to-date.
  • Adjust Operation Context: Modify BIOS settings or device driver configurations as necessary.
  • Restore Data: If corrupted data is suspected, restore from a known good backup if available.
  • Retry Operation with Valid Inputs: Attempt to initialize the hardware again using valid inputs.

Developer Notes

Developers should be aware that this error can occur due to various factors, including incorrect initialization parameters or unsupported hardware. Proper validation and handling of device interrupts are crucial for ensuring system stability and performance.

Related Errors

FAQ

Q: What does the ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT error mean?

A: This error indicates that the BIOS failed to properly configure an interrupt for a device or bus, leading to potential system instability.

Q: How can I prevent this error from occurring?

A: Ensure all hardware components are correctly configured and up-to-date. Verify that BIOS settings and device drivers are accurate and compatible with your system.

Q: Can this error be resolved by updating the BIOS or device drivers?

A: Yes, updating to a newer version of the BIOS or device drivers may resolve issues related to interrupt configuration.

Summary

ERROR_BIOS_FAILED_TO_CONNECT_INTERRUPT is a specific error indicating that the system BIOS failed to properly configure an interrupt for a device or bus. This can lead to system instability and reduced performance. Proper diagnosis involves reviewing operation context, validating parameters, confirming object types, verifying input data, and checking limits. Resolving this issue typically requires correcting parameter usage, adjusting operation context, restoring data if necessary, and retrying the operation with valid inputs.