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kernel panic with x86 kernel on AMD system with 8 cores or more in a CPU package

This document (7003498) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11


x86 architecture (32 bit) only

When booting a 32 bit kernel on an AMD system with 8 cores or more in a CPU package (e.g. during installation), the boot process stopps with the following error message:

Error: Kernel panic - not syncing: Boot APIC ID in local APIC unexpected (16 vs 0)

The x86_64 version of SLES 11 is not affected by this problem.


The problem can be solved by adding apic=bigsmp as a boot parameter.

Additional Information

If other APIC related symptoms on SLES11 x86 systems (systems with a lot of cores) are experienced, it would be also worth trying the above boot parameter.

The error might be fixed in a future Service Pack.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7003498
  • Creation Date: 10-Jun-2009
  • Modified Date:12-Oct-2022
    • SUSE Linux Enterprise Desktop
    • SUSE Linux Enterprise Server

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