Lockdown: xxxxxx /dev/mem,kmem,port is restricted; see man kernel_lockdown.7

This document (000021167) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Application 15



Below log appeared in /var/log/messages and dmesg.
Lockdown: numlockbios: /dev/mem,kmem,port is restricted; see man kernel_lockdown.7
Lockdown: fwupd: /dev/mem,kmem,port is restricted; see man kernel_lockdown.7
Lockdown: Zypp-main: /dev/mem,kmem,port is restricted; see man kernel_lockdown.7



Disable Secure boot in the server's BIOS and reboot the system.


Kernel Lock Down Feature automatically enable if the system boot in Secure Boot.

Additional Information

If System asked for YaST2 logs ( Run save_y2logs ) after a failed installation attempt. Please refer following KB.



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:000021167
  • Creation Date: 14-Aug-2023
  • Modified Date:31-Aug-2023
    • SUSE Linux Enterprise Server
    • SUSE Linux Enterprise Server for SAP Applications

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