[Bug 2146422] Re: Installer UI crashed with ServerDisconnectedError

[Valentin Haudiquet]

Reproducing instructions:

sudo apt install opensbi qemu-efi-riscv64 qemu-system-riscv
cp /usr/share/qemu-efi-riscv64/RISCV_VIRT_VARS.fd .
truncate -s 16G disk.img # Creates the virtual disk file where you want to install Ubuntu Server
curl -L -O https://cdimage.ubuntu.com/ubuntu-server/daily-live/20260325/resolute-live-server-riscv64.iso
qemu-system-riscv64 \
  -cpu rva23s64 \
  -machine virt,acpi=on -m 4G -smp cpus=2 \
  -nographic \
  -drive if=pflash,format=raw,unit=0,file=/usr/share/qemu-efi-riscv64/RISCV_VIRT_CODE.fd,readonly=on \
  -drive if=pflash,format=raw,unit=1,file=RISCV_VIRT_VARS.fd,readonly=off \
  -netdev user,id=net0 \
  -device virtio-net-device,netdev=net0 \
  -device virtio-rng-pci \
  -drive file=disk,format=raw,if=none,id=DISK \
  -device virtio-blk,drive=DISK,bootindex=1 \
  -drive file=resolute-live-server-riscv64.iso,format=raw,readonly=on,if=none,id=ISO \
  -device virtio-blk,drive=ISO,bootindex=2


More details at:
https://github.com/ubuntu/ubuntu-manual-tests/blob/main/resolute/testsuites/Ubuntu%20Subiquity%20riscv64/Mandatory/QEMU%20riscv64%20Install.md

https://canonical-ubuntu-hardware-support.readthedocs-
hosted.com/boards/how-to/ubuntu_supported/qemu-riscv/index.html

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https://bugs.launchpad.net/bugs/2146422

Title:
  Installer UI crashed with ServerDisconnectedError

Status in subiquity package in Ubuntu:
  Incomplete

Bug description:
  I tried to install current resolute-live-server-riscv64.iso. subiquity
  26.04-beta+git12.e422d423 failed with the error below. Full logs
  appended.

  SnapUpdated: True 
  SourcePackage: subiquity
  Tags: subiquity
  Title: Installer UI crashed with ServerDisconnectedError
  Traceback:
   Traceback (most recent call last):
     File "/snap/subiquity/7156/lib/python3.12/site-packages/subiquity/client/client.py", line 426, in run
       await super().run()
     File "/snap/subiquity/7156/lib/python3.12/site-packages/subiquitycore/tui.py", line 390, in run
       await super().run()
     File "/snap/subiquity/7156/lib/python3.12/site-packages/subiquitycore/core.py", line 133, in run
       raise exc
     File "/snap/subiquity/7156/lib/python3.12/site-packages/subiquity/client/client.py", line 367, in start
       variant = await self.client.meta.client_variant.GET()
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "/snap/subiquity/7156/lib/python3.12/site-packages/subiquity/common/api/client.py", line 75, in impl 
       async with make_request(
     File "/snap/subiquity/7156/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
       return await anext(self.gen)
              ^^^^^^^^^^^^^^^^^^^^^
     File "/snap/subiquity/7156/lib/python3.12/site-packages/subiquity/common/api/client.py", line 168, in make_request
       async with session.request(
     File "/snap/subiquity/7156/usr/lib/python3/dist-packages/aiohttp/client.py", line 1187, in __aenter__
       self._resp = await self._coro
                    ^^^^^^^^^^^^^^^^
     File "/snap/subiquity/7156/usr/lib/python3/dist-packages/aiohttp/client.py", line 601, in _request
       await resp.start(conn)
     File "/snap/subiquity/7156/usr/lib/python3/dist-packages/aiohttp/client_reqrep.py", line 965, in start
       message, payload = await protocol.read()  # type: ignore[union-attr]
                          ^^^^^^^^^^^^^^^^^^^^^
     File "/snap/subiquity/7156/usr/lib/python3/dist-packages/aiohttp/streams.py", line 622, in read 
       await self._waiter
   aiohttp.client_exceptions.ServerDisconnectedError: Server disconnected

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