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Knowledge Base

Accessing the BIOS when the POST screen clears too quickly (1004129)

Last Updated: 3/20/2024Categories: How toTotal Views: 556401Language:
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Learn how VMware Skyline Advisor and Skyline Health Diagnostics work together to provide proactive intelligence and self-service log analysis.

Use Skyline Advisor to avoid issues before they occur across VCF, vSphere, vSAN, NSX, vROps & Horizon. Skyline Findings are based on top KBs, VMSAs/CVEs and design best practices.

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If you require additional help from technical support, please use Skyline Advisor to initiate a Log Assist to reduce time to upload logs. TSEs can also initiate logs to reduce effort.

Purpose

This article assists you in gaining access to the BIOS options of the virtual machine in the event that it passes too quickly to interact with the screen.

Resolution

To make it easier to access the BIOS setup screen, edit the configuration (.vmx) of the virtual machine and add or edit one of these options:

bios.forceSetupOnce = "TRUE"

This forces entry to the BIOS setup at startup.

bios.bootDelay = "xxxx"

This adds a delay to the initial POST screen, showing it for longer and giving you more time to access the BIOS setup, where xxxx is the number of milliseconds to show the POST screen (There are 1000 milliseconds in a second.). The maximum value for the boot delay is 10000 milliseconds or 10 seconds.

Fusion

To make changes to the .vmx (virtual machine configuration file):

Shutdown the virtual machine.

Edit your .vmx file to include one of the two options above. For more information, see Editing the .vmx file for your Fusion virtual machine (1014782).

Note: To access BIOS Setup on Fusion 8.x , click virtual machine > Power On To Firmware.

Player

To make changes to the .vmx (virtual machine configuration file):

Shut down the virtual machine.

Edit the .vmx file to add one of the two options above. For more information on editing a .vmx file, see Tips for editing a .vmx file (1714).

ESXi /vCenter Server

To make changes to the configuration file:

Shutdown the virtual machine.

Right Click the VM from web-client/ HTML client and select edit setting

Select 'Boot Options' under 'VM Option'

Check for Force BIOS Setup.

Workstation 7.x and later

To enter the BIOS setup for the guest operating system, click VM > Power > Power On to BIOS.
Note: For newer Workstation versions, click VM > Power > Power On to Firmware.

Related Information

For related information, see Validating the .vmx settings of a virtual machine (1003748).

Tips for editing a .vmx file
Acessando a BIOS quando a tela POST se apaga rápido demais
Acceder al BIOS cuando la pantalla POST desaparece demasiado rápido
POST 屏幕清除太快时进入 BIOS
POST 画面がすぐにクリアされてしまう場合の BIOS へのアクセス

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