[Bug 2142826] Re: Fail to start correctly, error: "subiquity_server: SocketException: Connection failed (OS Error: No such file or directory, errno = 2), address = /run/subiquity/socket, port = 0"

Fri Feb 27 09:12:05 UTC 2026

*** This bug is a duplicate of bug 2142736 ***
    https://bugs.launchpad.net/bugs/2142736

Hello and thank you for your bug report!

A fix was merged yesterday (see bug 2142736) but the change hasn't yet
landed on the daily ISOs.

Thanks!

** This bug has been marked a duplicate of bug 2142736
   ModuleNotFoundError: No module named 'curtin.vendor'

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https://bugs.launchpad.net/bugs/2142826

Title:
  Fail to start correctly, error: "subiquity_server: SocketException:
  Connection failed (OS Error: No such file or directory, errno = 2),
  address = /run/subiquity/socket, port = 0"

Status in ubuntu-desktop-provision:
  New
Status in subiquity package in Ubuntu:
  New

Bug description:
  Running ubuntu-desktop-bootstrap failed due to installer service
  issues. The subiquity_server failed to start or create its socket at
  /run/subiquity/socket, leading to repeated SocketException connection
  errors.

  UI (ubuntu-desktop-bootstrap) fail to produce a useful error message,
  only getting "Sorry...", Show log is blank.

  ## LOG

  ubuntu at ubuntu:~$ ubuntu-desktop-bootstrap
  libEGL warning: failed to get driver name for fd -1

  libEGL warning: MESA-LOADER: failed to retrieve device information

  libEGL warning: failed to get driver name for fd -1

  MESA: error: ZINK: vkCreateInstance failed (VK_ERROR_INCOMPATIBLE_DRIVER)
  libEGL warning: egl: failed to create dri2 screen
  INFO ubuntu_bootstrap: Logging to /var/log/installer/ubuntu_bootstrap.log
  Gdk-Message: 07:25:15.061: Unable to load  from the cursor theme
  INFO flavor_provider: Using default flavor: UbuntuFlavor.ubuntu
  INFO subiquity_server: Waiting server up to 90 seconds
  ERROR subiquity_server: SocketException: Connection failed (OS Error: No such file or directory, errno = 2), address = /run/subiquity/socket, port = 0
  Gtk-Message: 07:25:15.129: Failed to load module "canberra-gtk-module"
  ERROR subiquity_server: SocketException: Connection failed (OS Error: No such file or directory, errno = 2), address = /run/subiquity/socket, port = 0
  ERROR subiquity_server: SocketException: Connection failed (OS Error: No such file or directory, errno = 2), address = /run/subiquity/socket, port = 0
  ERROR subiquity_server: SocketException: Connection failed (OS Error: No such file or directory, errno = 2), address = /run/subiquity/socket, port = 0
  ...repeats 84

  ERROR subiquity_server: SocketException: Connection failed (OS Error:
  No such file or directory, errno = 2), address =
  /run/subiquity/socket, port = 0

  (ubuntu_bootstrap:7491): Gdk-CRITICAL **: 07:27:47.282:
  gdk_device_get_source: assertion 'GDK_IS_DEVICE (device)' failed

  (ubuntu_bootstrap:7491): Gdk-CRITICAL **: 07:27:47.837: gdk_device_get_source: assertion 'GDK_IS_DEVICE (device)' failed
  embedder.cc (2575): 'FlutterEngineRemoveView' returned 'kInvalidArguments'. Remove view info was invalid. The implicit view cannot be removed.

  ** (ubuntu_bootstrap:7491): WARNING **: 07:27:48.911: Failed to
  cleanup compositor shaders, unable to make OpenGL context current

  ** (ubuntu_bootstrap:7491): WARNING **: 07:27:48.948: Attempted to set
  message handler on an FlBinaryMessenger without an engine

  ** (ubuntu_bootstrap:7491): WARNING **: 07:27:48.948: Attempted to set
  message handler on an FlBinaryMessenger without an engine

  (ubuntu_bootstrap:7491): GLib-GObject-CRITICAL **: 07:27:48.948:
  invalid unclassed pointer in cast to 'FlView'

  (ubuntu_bootstrap:7491): GLib-GObject-CRITICAL **: 07:27:48.948:
  invalid unclassed pointer in cast to 'GtkWidget'

  (ubuntu_bootstrap:7491): Gtk-CRITICAL **: 07:27:48.948:
  gtk_widget_queue_draw: assertion 'GTK_IS_WIDGET (widget)' failed

  ## Hardware

  Proxmox virtual machine

  Linux ubuntu 6.19.0-6-generic #6-Ubuntu SMP PREEMPT_DYNAMIC Wed Feb 18 15:48:21 UTC 2026 x86_64 GNU/Linux
  Distributor ID: Ubuntu
  Description:    Ubuntu Resolute Raccoon (development branch) snapshot-4
  Release:        26.04
  Codename:       resolute
  System:
    Host: ubuntu Kernel: 6.19.0-6-generic arch: x86_64 bits: 64
    Desktop: GNOME v: 49.2 Distro: Ubuntu 26.04 (Resolute Raccoon)
  Machine:
    Type: Kvm System: QEMU product: Standard PC (i440FX + PIIX, 1996)
      v: pc-i440fx-10.1 serial: N/A
    Mobo: N/A model: N/A serial: N/A Firmware: UEFI vendor: Proxmox
      distribution of EDK II v: 4.2025.05-2 date: 11/13/2025
  CPU:
    Info: quad core model: QEMU Virtual version 2.5+ bits: 64 type: MCP cache:
      L2: 16 MiB
    Speed (MHz): avg: 3696 min/max: N/A cores: 1: 3696 2: 3696 3: 3696 4: 3696
  Graphics:
    Device-1: driver: bochs-drm v: N/A
    Display: unspecified server: X.Org v: 24.1.9 with: Xwayland v: 24.1.9
      driver: dri: swrast gpu: bochs-drm resolution: 1280x800~75Hz
    API: EGL v: 1.5 drivers: swrast platforms: x11,surfaceless,device
    API: OpenGL v: 4.5 vendor: mesa v: 25.3.3-1ubuntu1 renderer: llvmpipe
      (LLVM 21.1.8 128 bits)
    Info: Tools: api: eglinfo,glxinfo x11: xdriinfo, xdpyinfo, xprop, xrandr
  Audio:
    Message: No device data found.
    API: ALSA v: k6.19.0-6-generic status: kernel-api
  Network:
    Device-1: Intel 82371AB/EB/MB PIIX4 ACPI type: network bridge
      driver: piix4_smbus
    Device-2: Red Hat Virtio network driver: virtio-pci
    IF: ens18 state: up speed: -1 duplex: unknown mac: bc:24:11:29:9e:a1
  Drives:
    Local Storage: total: 32 GiB used: 0 KiB (0.0%)
    ID-1: /dev/sda vendor: QEMU model: HARDDISK size: 32 GiB
  Partition:
    ID-1: / size: 5.71 GiB used: 540.4 MiB (9.2%) fs: overlay source: ERR-102
  Swap:
    Alert: No swap data was found.
  Sensors:
    Src: lm-sensors+/sys Message: No sensor data found using /sys/class/hwmon
      or lm-sensors.
  Info:
    Memory: total: 11.74 GiB available: 11.42 GiB used: 3.31 GiB (29.0%)
    Processes: 258 Uptime: 42m Shell: Bash inxi: 3.3.40

  ## snap.ubuntu-desktop-bootstrap.subiquity-server.service

  Feb 27 07:19:29 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Scheduled restart job, restart counter is at 48.
  Feb 27 07:19:29 ubuntu systemd[1]: Started snap.ubuntu-desktop-bootstrap.subiquity-server.service - Service for snap application ubuntu-desktop-bootstrap.subiquity-server.
  Feb 27 07:19:29 ubuntu -m[6179]: i18n file is /snap/ubuntu-desktop-bootstrap/507/bin/subiquity/subiquitycore/i18n.py
  Feb 27 07:19:29 ubuntu -m[6179]: Final localedir is /snap/ubuntu-desktop-bootstrap/share/locale
  Feb 27 07:19:29 ubuntu -m[6179]: switch_language en_US
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]: Traceback (most recent call last):
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "<frozen runpy>", line 198, in _run_module_as_main
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "<frozen runpy>", line 88, in _run_code
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "/snap/ubuntu-desktop-bootstrap/507/bin/subiquity/subiquity/cmd/server.py", line 26, in <module>
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:     from subiquity.server.controllers.filesystem import set_user_error_reportable
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "/snap/ubuntu-desktop-bootstrap/507/bin/subiquity/subiquity/server/controllers/__init__.py", line 20, in <module>
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:     from .drivers import DriversController
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "/snap/ubuntu-desktop-bootstrap/507/bin/subiquity/subiquity/server/controllers/drivers.py", line 22, in <module>
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:     from subiquity.server.apt import OverlayCleanupError
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "/snap/ubuntu-desktop-bootstrap/507/bin/subiquity/subiquity/server/apt.py", line 30, in <module>
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:     from curtin.commands.extract import AbstractSourceHandler
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "/snap/ubuntu-desktop-bootstrap/507/lib/python3.12/site-packages/curtin/commands/extract.py", line 15, in <module>
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:     from curtin import util
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:   File "/snap/ubuntu-desktop-bootstrap/507/lib/python3.12/site-packages/curtin/util.py", line 24, in <module>
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]:     from curtin.vendor.cpython.platform import parse_os_release
  Feb 27 07:19:31 ubuntu ubuntu-desktop-bootstrap.subiquity-server[6179]: ModuleNotFoundError: No module named 'curtin.vendor'
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Main process exited, code=exited, status=1/FAILURE
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Failed with result 'exit-code'.
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Consumed 1.517s CPU time over 1.724s wall clock time, 34.5M memory peak.
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Scheduled restart job, restart counter is at 49.
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Start request repeated too quickly.
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Failed with result 'exit-code'.
  Feb 27 07:19:31 ubuntu systemd[1]: Failed to start snap.ubuntu-desktop-bootstrap.subiquity-server.service - Service for snap application ubuntu-desktop-bootstrap.subiquity-server.
  Feb 27 07:19:31 ubuntu systemd[1]: snap.ubuntu-desktop-bootstrap.subiquity-server.service: Consumed 1.517s CPU time over 229ms wall clock time, 34.5M memory peak.

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