HP server fails to boot, getting a Red Screen with Illegal Opcode

Solution Verified - Updated -


  • Error occurs before loading grub
  • System will not boot
  • The boot process stops before the grub screen
  • The error that appears on a red screen displaying an illegal opcode message as shown in the following:
    Illegal Opcode

  • Disabled ASR in BIOS of HP DL 370 and now the machine fails to boot with the following error.

    > Illegal Op code  
    > EAX=00000000&EBX=00007C00 ECX=00000001 EDX=00000180  
    > EBP=0000938C ESI=000007BEEDI=00000800  
    > DS=0000ES=0000 FS=0000GS=0000  
    > CS:EIP=0000:00007E00 SS:ESP=1000:0000B000  
    > ELFLAGS=00000202


  • HP Hardware
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content