[Bug 2104027] Re: "Operating System Not Found" Error During Ubuntu Server 25.04 (Plucky Puffin) Installation on x86 architecture

[Frank Heimes]

Hello himabinduy,
I'm sorry, but I do not have VMware at hand.
But I am relatively sure (from all what I could find and read) that this is likely an issue with VMware (or it's configuration) rather than with Ubuntu 25.04 itself.

If you are sure that the ISO image is correct (and wasn't corrupted at
download time, and has the correct hash - btw. the 25.04 release ISO is
out now: https://releases.ubuntu.com/plucky/ubuntu-25.04-live-server-
amd64.iso ) double check if the (virtual) CDROM is properly "connected"
- disconnect and connect it again, and ensure that the path to the ISO
is correct.

Please also check these sources:
https://knowledge.broadcom.com/external/article/389461/no-operating-system-was-found-occurred-w.html
https://www.vinchin.com/vm-tips/vmware-operating-system-not-found.html

Alternatively one may use the Cloud image instead of the ISO for VMware virtual machine image:
https://partnerweb.vmware.com/GOSIG/Ubuntu_cloud_image.html

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https://bugs.launchpad.net/bugs/2104027

Title:
  "Operating System Not Found" Error During Ubuntu Server 25.04 (Plucky
  Puffin) Installation on x86 architecture

Status in subiquity package in Ubuntu:
  Incomplete

Bug description:
  ---Problem Description---
  Operating System Not Found" Error During Ubuntu Server 25.04 (Plucky Puffin) Installation on x86 architecture
   
  ---uname output---
  vmware version-7.0.3
    
  Machine Type = vmware version-7.0.3 
   
  ---boot type---
  CDROM / ISO image
   
  ---Install repository type---
  CDROM
   
  ---Point of failure---
  Failed during boot of installer

  Steps to Reproduce:
  1. Create a virtual machine x86 system.
  2. Attach the Ubuntu Server 25.04 (AMD64) ISO as the installation medium.
  3. then boot for installation(start the Lpar)
  The system fails to boot and displays:
  PXE-E51: No DHCP or proxyDHCP offers were received.
  PXE-M0F: Exiting Intel PXE ROM.
  Operating System not found.

  1. Did this installation work with prior 25.04 builds or other
  versions of Ubuntu?

  ans: Yes, it has been working with all versions up to 24.10.

  2. Is the boot order set to boot to the virtual cdrom or the USB
  flashdrive the ISO was written to?

  Yes, the boot order is set to boot from the CD-ROM only.

  Please check the attached screenshot of BIOS setup

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