Something went wrong during installation of 26.04 LTS
https://askubuntu.com/questions/1567999/something-went-wrong-during-installation-of-26-04-lts
First, thanks for the feedback. I'm embarrassed because IRL, I used to do QA.
I'm trying to install Ubuntu 26.04 LTS Desktop to an external SanDisk 4 TB SSD drive from a usb microsd card reader with a 28 GB card in it.
I get the "Something went wrong" screen. This happens with two different computers.
This is very reproducible.
The download checksum verified successfully.
Here is the subiquity-server-info.log:
2026-06-28 17:00:59,885 INFO subiquity:234 Starting Subiquity server revision 589 of snap /snap/ubuntu-desktop-bootstrap/589 of version 26.04
2026-06-28 17:00:59,885 INFO subiquity:238 Arguments passed: ['/snap/ubuntu-desktop bootstrap/589/bin/subiquity/subiquity/cmd/server.py', '--use-os-prober', '--storage-version=2', '--postinst-hooks-dir=/snap/ubuntu-desktop-bootstrap/589/etc/subiquity/postinst.d', '--no-wlan-listene
r']
2026-06-28 17:01:14,820 INFO root:38 start: subiquity/apply_autoinstall_config:
2026-06-28 17:01:14,822 INFO root:38 finish: subiquity/apply_autoinstall_config: SUCCESS:
2026-06-28 17:01:17,858 ERROR root:38 finish: subiquity/Refresh/check_for_update: FAIL: cancelled
2026-06-28 17:01:17,865 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:01:17,865 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "WAITING", "confirming_tty": "", "error": null, "nonreportable_erro...
2026-06-28 17:01:17,868 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:01:17,868 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "WAITING", "confirming_tty": "", "error": null, "nonreportable_erro...
2026-06-28 17:01:17,869 INFO root:38 start: subiquity/Meta/client_variant_POST:
2026-06-28 17:01:17,869 INFO root:38 finish: subiquity/Meta/client_variant_POST: SUCCESS: 200 null
2026-06-28 17:01:17,869 INFO root:38 start: subiquity/Meta/mark_configured_POST:
2026-06-28 17:01:17,870 INFO root:38 finish: subiquity/Meta/mark_configured_POST: SUCCESS: 200 null
2026-06-28 17:01:18,424 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:01:18,424 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "WAITING", "confirming_tty": "", "error": null, "nonreportable_erro...
2026-06-28 17:01:18,424 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:01:18,424 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "WAITING", "confirming_tty": "", "error": null, "nonreportable_erro...
2026-06-28 17:01:18,424 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:01:18,425 INFO root:38 start: subiquity/Meta/interactive_sections_GET:
2026-06-28 17:01:18,425 INFO root:38 finish: subiquity/Meta/interactive_sections_GET: SUCCESS: 200 null
2026-06-28 17:01:18,947 ERROR probert.multipath:37 Failed to run cmd: ['multipathd', 'show', 'maps', 'raw', 'format', '%w,%d,%N']
2026-06-28 17:01:18,947 ERROR probert.multipath:37 Failed to run cmd: ['multipathd', 'show', 'paths', 'raw', 'format', '%d,%z,%m,%N,%n,%R,%r,%a']
2026-06-28 17:01:47,211 INFO curtin:1498 Validating extracted storage config components
2026-06-28 17:02:14,325 ERROR probert.multipath:37 Failed to run cmd: ['multipathd', 'show', 'maps', 'raw', 'format', '%w,%d,%N']
2026-06-28 17:02:14,326 ERROR probert.multipath:37 Failed to run cmd: ['multipathd', 'show', 'paths', 'raw', 'format', '%d,%z,%m,%N,%n,%R,%r,%a']
2026-06-28 17:02:14,484 INFO curtin:1498 Validating extracted storage config components
2026-06-28 17:02:19,662 ERROR probert.multipath:37 Failed to run cmd: ['multipathd', 'show', 'maps', 'raw', 'format', '%w,%d,%N']
2026-06-28 17:02:19,663 ERROR probert.multipath:37 Failed to run cmd: ['multipathd', 'show', 'paths', 'raw', 'format', '%d,%z,%m,%N,%n,%R,%r,%a']
2026-06-28 17:02:19,857 INFO curtin:1498 Validating extracted storage config components
2026-06-28 17:02:30,733 INFO subiquity.server.controllers.filesystem:1341 Resetting Filesystem model
2026-06-28 17:02:30,847 INFO curtin:1498 Validating extracted storage config components
2026-06-28 17:03:10,979 INFO root:38 start: subiquity/Meta/mark_configured_POST:
2026-06-28 17:03:10,979 INFO root:38 finish: subiquity/Meta/mark_configured_POST: SUCCESS: 200 null
2026-06-28 17:03:12,517 INFO subiquity.server.controllers.filesystem:1341 Resetting Filesystem model
2026-06-28 17:03:12,611 INFO curtin:1498 Validating extracted storage config components
2026-06-28 17:03:12,752 INFO curtin:1498 Validating extracted storage config components
2026-06-28 17:03:36,924 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:36,924 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "WAITING", "confirming_tty": "", "error": null, "nonreportable_erro...
2026-06-28 17:03:36,942 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:36,942 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "WAITING", "confirming_tty": "", "error": null, "nonreportable_erro...
2026-06-28 17:03:36,946 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:37,124 INFO root:38 start: subiquity/Meta/mark_configured_POST:
2026-06-28 17:03:37,124 INFO root:38 finish: subiquity/Meta/mark_configured_POST: SUCCESS: 200 null
2026-06-28 17:03:37,125 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "NEEDS_CONFIRMATION", "confirming_tty": "", "error": null, "nonrepo...
2026-06-28 17:03:37,125 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "NEEDS_CONFIRMATION", "confirming_tty": "", "error": null, "nonrepo...
2026-06-28 17:03:37,125 INFO root:38 start: subiquity/Meta/confirm_POST:
2026-06-28 17:03:37,126 INFO root:38 finish: subiquity/Meta/confirm_POST: SUCCESS: 200 null
2026-06-28 17:03:37,126 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:37,126 INFO root:38 start: subiquity/Install/install/configure_apt: configuring apt
2026-06-28 17:03:37,141 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "RUNNING", "confirming_tty": "/dev/tty1", "error": null, "nonreport...
2026-06-28 17:03:37,141 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:37,141 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "RUNNING", "confirming_tty": "/dev/tty1", "error": null, "nonreport...
2026-06-28 17:03:37,141 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:37,141 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:51,122 INFO root:38 finish: subiquity/Install/install/configure_apt: SUCCESS: configuring apt
2026-06-28 17:03:51,123 INFO root:38 start: subiquity/Install/install/curtin_install: installing system
2026-06-28 17:03:53,593 ERROR root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-partitioning/builtin/cmd-block-meta/: FAIL: configuring disk: disk-sdb
2026-06-28 17:03:53,593 ERROR root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-partitioning/builtin: FAIL: running 'curtin block-meta simple'
2026-06-28 17:03:53,593 ERROR root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-partitioning: FAIL: configuring storage
2026-06-28 17:03:55,848 ERROR root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step: FAIL:
2026-06-28 17:03:55,849 ERROR root:38 finish: subiquity/Install/install/curtin_install: FAIL:
2026-06-28 17:03:55,853 INFO subiquity.common.errorreport:417 saving crash report 'partitioning crashed with CurtinInstallError' to /var/crash/1782666235.849218130.install_fail.crash
2026-06-28 17:03:55,853 ERROR root:38 finish: subiquity/Install/install: FAIL:
2026-06-28 17:03:55,854 INFO root:38 start: subiquity/ErrorReporter/1782666235.849218130.install_fail/add_info:
2026-06-28 17:03:55,854 ERROR subiquity.server.server:536 top level error
Traceback (most recent call last):
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/controllers/install.py", line 250, in run_curtin_step
await run_curtin_command(
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/curtin.py", line 279, in run_curtin_command
return await cmd.wait(input=input)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/curtin.py", line 134, in wait
result = await self.runner.wait(self.proc, input=input)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/runner.py", line 209, in wait
return await self.backend.wait(proc, input=input)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/runner.py", line 142, in wait
raise subprocess.CalledProcessError(
subprocess.CalledProcessError: Command '['systemd-run', '--wait', '--same-dir', '--property', 'SyslogIdentifier=subiquity_log.4356', '--setenv', 'PATH=/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/bin:/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/usr/bin:/snap/ubuntu-desktop-bootstrap/589/bin:/snap/ubuntu-desktop-bootstrap/589/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin', '--setenv', 'PYTHONPATH=/snap/ubuntu-desktop-bootstrap/589/lib/python3.12/site-packages:/snap/ubuntu-desktop-bootstrap/589/usr/lib/python3/dist-packages:/snap/ubuntu-desktop-bootstrap/589/usr/lib/python3/site-packages:', '--setenv', 'PYTHON=/snap/ubuntu-desktop-bootstrap/589/usr/bin/python3.12', '--setenv', 'SNAP=/snap/ubuntu-desktop-bootstrap/589', '--', '/snap/ubuntu-desktop-bootstrap/589/usr/bin/python3.12', '-m', 'curtin', '--showtrace', '-vvv', '--set', 'json:reporting={"subiquity": {"type": "journald", "identifier": "curtin_event.4356.6"}}', '-c', '/var/log/installer/curtin-install/subiquity-partitioning.conf', 'install', '--set', 'json:stages=["partitioning"]', 'cp:///tmp/tmpqa9ipwjl/mount']' returned non-zero exit status 3.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/controllers/shutdown.py", line 72, in _wait_install
await self.app.controllers.Install.install_task
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquitycore/context.py", line 165, in decorated_async
return await meth(self, **kw)
^^^^^^^^^^^^^^^^^^^^^^
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/controllers/install.py", line 661, in install
await self.curtin_install(context=context, source=for_install_path)
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquitycore/context.py", line 165, in decorated_async
return await meth(self, **kw)
^^^^^^^^^^^^^^^^^^^^^^
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/controllers/install.py", line 425, in curtin_install
await run_curtin_step(
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/controllers/install.py", line 363, in run_curtin_step
await self.run_curtin_step(
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquitycore/context.py", line 165, in decorated_async
return await meth(self, **kw)
^^^^^^^^^^^^^^^^^^^^^^
File "/snap/ubuntu-desktop-bootstrap/589/bin/subiquity/subiquity/server/controllers/install.py", line 261, in run_curtin_step
raise CurtinInstallError(stages=stages)
subiquity.server.controllers.install.CurtinInstallError
2026-06-28 17:03:55,854 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "/dev/tty1", "error": {"state": "INCOMPL...
2026-06-28 17:03:55,855 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "/dev/tty1", "error": {"state": "INCOMPL...
2026-06-28 17:03:55,855 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:55,855 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:55,876 INFO root:38 start: subiquity/Meta/status_GET:
2026-06-28 17:03:55,877 INFO root:38 finish: subiquity/Meta/status_GET: SUCCESS: 200 {"state": "ERROR", "confirming_tty": "/dev/tty1", "error": {"state": "INCOMPL...
2026-06-28 17:03:56,093 ERROR root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install: FAIL: curtin command install
2026-06-28 17:03:56,637 INFO root:38 finish: subiquity/ErrorReporter/1782666235.849218130.install_fail/add_info: SUCCESS: written to /var/crash/1782666235.849218130.install_fail.crash