** Description changed:
Dist-upgrading from releases with systemd<=255 (specifically Noble) to
Resolute is currently failing.
This is caused by the new unit `tmp.mount` (introduced in systemd>=256),
which will remount /tmp as tmpfs. As this is essentially overwriting
/tmp, while the the dist-upgrade tool is running in this directory, the
tool is crashing.
There used to be a workaround (in d/systemd.preinst) that took good care
of this situation, which is why there were no issues with Plucky and
Questing. However, after the release of Trixie, the maintainer removed
this (now obsolete) workaround from the Debian package. With the latest
sync from upstream, this workaround was also removed for Resolute,
although it is still needed for upgrading from Noble.
+
+ Relevant lines from the crash log:
+ DuplicateSignature:
+ Traceback (most recent call last):
+ File "/tmp/ubuntu-release-upgrader-tmpdir/resolute", line 8, in <module>
+ File "/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeMain.py",
line 235, in main
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1985, in run
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1961, in fullUpgrade
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1543, in doPostUpgrade
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 280, in openCache
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 304, in _openCache
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeCache.py", line
173, in __init__
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeConfigParser.py",
line 89, in getListFromFile
+ FileNotFoundError: [Errno 2] No such file or directory:
'/tmp/ubuntu-release-upgrader-tmpdir/removal_denylist.cfg'
+
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: systemd 259-1ubuntu3
ProcVersionSignature: User Name 6.19.0-9.9-generic 6.19.5
Uname: Linux 6.19.0-9-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CloudArchitecture: x86_64
CloudBuildName: server
CloudID: multipass
CloudName: multipass
CloudPlatform: nocloud
CloudSerial: 20260225
CloudSubPlatform: config-disk (/dev/sr0)
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read
kernel buffer failed: Operation not permitted
Date: Thu Mar 12 17:09:03 2026
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
-
+
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcEnviron:
- LANG=C.UTF-8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-256color
- XDG_RUNTIME_DIR=<set>
+ LANG=C.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.19.0-9-generic
root=UUID=e9e564d2-b0d5-4dfb-ad4b-c67dd03e8226 ro console=tty1 console=ttyS0
SourcePackage: systemd
UpgradeStatus: Upgraded to resolute on 2026-03-12 (0 days ago)
acpidump:
-
+
dmi.bios.date: 02/06/2015
dmi.bios.release: 0.0
dmi.bios.vendor: EFI Development Kit II / OVMF
dmi.bios.version: 0.0.0
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-8.2
dmi.modalias:
dmi:bvnEFIDevelopmentKitII/OVMF:bvr0.0.0:bd02/06/2015:br0.0:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-8.2:cvnQEMU:ct1:cvrpc-i440fx-8.2:sku:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-8.2
dmi.sys.vendor: QEMU
** Also affects: systemd (Ubuntu Resolute)
Importance: Undecided
Assignee: Oliver Reiche (oreiche)
Status: New
** Description changed:
Dist-upgrading from releases with systemd<=255 (specifically Noble) to
Resolute is currently failing.
This is caused by the new unit `tmp.mount` (introduced in systemd>=256),
which will remount /tmp as tmpfs. As this is essentially overwriting
/tmp, while the the dist-upgrade tool is running in this directory, the
tool is crashing.
There used to be a workaround (in d/systemd.preinst) that took good care
of this situation, which is why there were no issues with Plucky and
Questing. However, after the release of Trixie, the maintainer removed
this (now obsolete) workaround from the Debian package. With the latest
sync from upstream, this workaround was also removed for Resolute,
although it is still needed for upgrading from Noble.
- Relevant lines from the crash log:
+ Relevant lines from the crash log (full log attached):
DuplicateSignature:
- Traceback (most recent call last):
- File "/tmp/ubuntu-release-upgrader-tmpdir/resolute", line 8, in <module>
- File "/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeMain.py",
line 235, in main
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1985, in run
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1961, in fullUpgrade
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1543, in doPostUpgrade
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 280, in openCache
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 304, in _openCache
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeCache.py", line
173, in __init__
- File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeConfigParser.py",
line 89, in getListFromFile
- FileNotFoundError: [Errno 2] No such file or directory:
'/tmp/ubuntu-release-upgrader-tmpdir/removal_denylist.cfg'
-
+ Traceback (most recent call last):
+ File "/tmp/ubuntu-release-upgrader-tmpdir/resolute", line 8, in <module>
+ File "/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeMain.py",
line 235, in main
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1985, in run
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1961, in fullUpgrade
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 1543, in doPostUpgrade
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 280, in openCache
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeController.py",
line 304, in _openCache
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeCache.py", line
173, in __init__
+ File
"/tmp/ubuntu-release-upgrader-tmpdir/DistUpgrade/DistUpgradeConfigParser.py",
line 89, in getListFromFile
+ FileNotFoundError: [Errno 2] No such file or directory:
'/tmp/ubuntu-release-upgrader-tmpdir/removal_denylist.cfg'
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: systemd 259-1ubuntu3
ProcVersionSignature: User Name 6.19.0-9.9-generic 6.19.5
Uname: Linux 6.19.0-9-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CloudArchitecture: x86_64
CloudBuildName: server
CloudID: multipass
CloudName: multipass
CloudPlatform: nocloud
CloudSerial: 20260225
CloudSubPlatform: config-disk (/dev/sr0)
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read
kernel buffer failed: Operation not permitted
Date: Thu Mar 12 17:09:03 2026
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.19.0-9-generic
root=UUID=e9e564d2-b0d5-4dfb-ad4b-c67dd03e8226 ro console=tty1 console=ttyS0
SourcePackage: systemd
UpgradeStatus: Upgraded to resolute on 2026-03-12 (0 days ago)
acpidump:
dmi.bios.date: 02/06/2015
dmi.bios.release: 0.0
dmi.bios.vendor: EFI Development Kit II / OVMF
dmi.bios.version: 0.0.0
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-8.2
dmi.modalias:
dmi:bvnEFIDevelopmentKitII/OVMF:bvr0.0.0:bd02/06/2015:br0.0:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-8.2:cvnQEMU:ct1:cvrpc-i440fx-8.2:sku:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-8.2
dmi.sys.vendor: QEMU
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https://bugs.launchpad.net/bugs/2144032
Title:
Upgrading from Noble overwrites /tmp causing dist-upgrade tool to
crash
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