[Bug 2146772] Re: Subiquity (Flutter) instantly skips to "Success" screen without performing installation in Ubuntu 26.04 Resolute Racoon Beta in kvm/virt-manager.

[Aamare Khalfan Simba]

For completeness, here is the KVM/Virt-Manager config of a VM with the
exact identical specs of the VM I was using when i saw the bug.

<domain type="kvm">
  <name>ubuntu26.10</name>
  <uuid>3aab4d44-243c-46f6-bef5-a19ec4299965</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
      <libosinfo:os id="http://ubuntu.com/ubuntu/25.10"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory>4194304</memory>
  <currentMemory>4194304</currentMemory>
  <vcpu>2</vcpu>
  <os>
    <type arch="x86_64" machine="q35">hvm</type>
    <loader readonly="yes" type="pflash">/usr/share/edk2/x64/OVMF_CODE.4m.fd</loader>
    <boot dev="hd"/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode="host-passthrough"/>
  <clock offset="utc">
    <timer name="rtc" tickpolicy="catchup"/>
    <timer name="pit" tickpolicy="delay"/>
    <timer name="hpet" present="no"/>
  </clock>
  <pm>
    <suspend-to-mem enabled="no"/>
    <suspend-to-disk enabled="no"/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type="file" device="disk">
      <driver name="qemu" type="qcow2" discard="unmap"/>
      <source file="/var/lib/libvirt/images/ubuntu26.10.qcow2"/>
      <target dev="vda" bus="virtio"/>
    </disk>
    <disk type="file" device="cdrom">
      <driver name="qemu" type="raw"/>
      <source file="/home/aamare/aamare/Downloads/ubuntu-26.04-beta-desktop-amd64.iso"/>
      <target dev="sda" bus="sata"/>
      <readonly/>
    </disk>
    <controller type="usb" model="qemu-xhci" ports="15"/>
    <controller type="pci" model="pcie-root"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <controller type="pci" model="pcie-root-port"/>
    <interface type="network">
      <source network="default"/>
      <mac address="52:54:00:1d:49:fb"/>
      <model type="virtio"/>
    </interface>
    <console type="pty"/>
    <channel type="unix">
      <source mode="bind"/>
      <target type="virtio" name="org.qemu.guest_agent.0"/>
    </channel>
    <input type="tablet" bus="usb"/>
    <graphics type="vnc" port="-1"/>
    <video>
      <model type="vga"/>
    </video>
    <memballoon model="virtio"/>
    <rng model="virtio">
      <backend model="random">/dev/urandom</backend>
    </rng>
  </devices>
</domain>

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https://bugs.launchpad.net/bugs/2146772

Title:
  Subiquity (Flutter) instantly skips to "Success" screen without
  performing installation in Ubuntu 26.04 Resolute Racoon Beta in
  kvm/virt-manager.

Status in subiquity package in Ubuntu:
  New

Bug description:
  On the latest Ubuntu 26.04 Resolute Racoon Beta (daily build, downloaded on 29/03/2026), Subiquity instantly skips to "Ubuntu 26.04 is installed and ready to use" screen without performing the install on KVM/Virt-Manager. This happens even if I update the installer or not, and even if I partition the drive or not.
  My host machine's specs are as follows:

  Model: ThinkPad X1 Carbon 5th Gen (i7-7500U)

  Host OS: Arch Linux (Kernel 6.19.8-arch1-1)

  Storage: Toshiba NVMe SSD (Host root is Btrfs)

  Hypervisor: Virtual Machine Manager (virt-manager) / libvirt

  I want to make this clear that all versions of Ubuntu Linux and all
  other Linux distributions I have tried in the past worked with this
  configuration and hypervisor.

  As for the versions of Subiquity, I tried both the updated one that
  was offered to me in the install process and the version on the ISO as
  of downloading it.

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