Hello Himabinduy, I am not sure if I can be of any help in this case. The bug came in under the umbrella of the IBM Power project, but it is obviously amd64 in a VMware environment - and I am not familiar with that. But I at least try to help ...
Since plucky / 25.04 was still under heavy development 2 weeks ago there could always be a bad ISO image. I recommend to retry with the current beta: https://releases.ubuntu.com/25.04/ https://releases.ubuntu.com/25.04/ubuntu-25.04-beta-live-server-amd64.iso that should have already stabilized a bit. (and checking the hash) Then I read that you said that the boot order is set to CD-ROM only, but the boot messages show an PXE (netboot) attempt, which wonders me. Probably worth to re-check the settings, and if they are persistent. The plucky / 25.04 release already seems to work fine in many other cases, so I think that this is not a general issue with the ISO images themselves. You may alternatively create a bootable USB stick and try that, booting from USB (instead of booting the ISO as virtual CDROM). In case you run your system under an Ubuntu subscription (Pro), it might be worth to open an official support case (in SalesForce), our support colleagues may have more options/environments to help in this praticular case and on this platform (compared to me, since I work on IBM platforms). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2104027 Title: "Operating System Not Found" Error During Ubuntu Server 25.04 (Plucky Puffin) Installation on x86 architecture To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/2104027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
