[Bug 2143544] [NEW] error while installing a partial update on Lubuntu 26.04

[Guybrush88]

Public bug reported:

I got this error while installing a partial updte on Lubuntu 26.04
== Traceback ==
Traceback (most recent call last):
  File "/usr/lib/ubuntu-release-upgrader/do-partial-upgrade", line 33, in <module>
    from DistUpgrade.DistUpgradeController import DistUpgradeController
  File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeController.py", line 43, in <module>
    from .utils import (url_downloadable,
    ...<5 lines>...
                        inhibit_sleep)
ImportError: cannot import name 'inhibit_sleep' from 'DistUpgrade.utils' (/usr/lib/python3/dist-packages/DistUpgrade/utils.py)
--- 
ProblemType: Bug
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CurrentDesktop: LXQt
DistroRelease: Ubuntu 26.04
InstallationDate: Installed on 2025-09-09 (178 days ago)
InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
Package: ubuntu-release-upgrader (not installed)
ProcVersionSignature: Ubuntu 6.19.0-5.5-generic 6.19.0
RebootRequiredPkgs: Error: path contained symlinks.
Tags: resolute dist-upgrade
Uname: Linux 6.19.0-5-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
VarLogDistupgradeTermlog:
 
_MarkForUpload: True
mtime.conffile..etc.apport.crashdb.conf: 2025-12-13T23:32:16.322793

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected dist-upgrade resolute

** Tags added: apport-collected dist-upgrade resolute

** Description changed:

  I got this error while installing a partial updte on Lubuntu 26.04
  == Traceback ==
  Traceback (most recent call last):
    File "/usr/lib/ubuntu-release-upgrader/do-partial-upgrade", line 33, in <module>
      from DistUpgrade.DistUpgradeController import DistUpgradeController
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeController.py", line 43, in <module>
      from .utils import (url_downloadable,
      ...<5 lines>...
                          inhibit_sleep)
  ImportError: cannot import name 'inhibit_sleep' from 'DistUpgrade.utils' (/usr/lib/python3/dist-packages/DistUpgrade/utils.py)
+ --- 
+ ProblemType: Bug
+ ApportVersion: 2.33.1-0ubuntu3
+ Architecture: amd64
+ CasperMD5CheckResult: unknown
+ CrashDB: ubuntu
+ CurrentDesktop: LXQt
+ DistroRelease: Ubuntu 26.04
+ InstallationDate: Installed on 2025-09-09 (178 days ago)
+ InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
+ Package: ubuntu-release-upgrader (not installed)
+ ProcVersionSignature: Ubuntu 6.19.0-5.5-generic 6.19.0
+ RebootRequiredPkgs: Error: path contained symlinks.
+ Tags: resolute dist-upgrade
+ Uname: Linux 6.19.0-5-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: N/A
+ VarLogDistupgradeTermlog:
+  
+ _MarkForUpload: True
+ mtime.conffile..etc.apport.crashdb.conf: 2025-12-13T23:32:16.322793

-- 
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Ubuntu.
https://bugs.launchpad.net/bugs/2143544

Title:
  error while installing a partial update on Lubuntu 26.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  I got this error while installing a partial updte on Lubuntu 26.04
  == Traceback ==
  Traceback (most recent call last):
    File "/usr/lib/ubuntu-release-upgrader/do-partial-upgrade", line 33, in <module>
      from DistUpgrade.DistUpgradeController import DistUpgradeController
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeController.py", line 43, in <module>
      from .utils import (url_downloadable,
      ...<5 lines>...
                          inhibit_sleep)
  ImportError: cannot import name 'inhibit_sleep' from 'DistUpgrade.utils' (/usr/lib/python3/dist-packages/DistUpgrade/utils.py)
  --- 
  ProblemType: Bug
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: LXQt
  DistroRelease: Ubuntu 26.04
  InstallationDate: Installed on 2025-09-09 (178 days ago)
  InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
  Package: ubuntu-release-upgrader (not installed)
  ProcVersionSignature: Ubuntu 6.19.0-5.5-generic 6.19.0
  RebootRequiredPkgs: Error: path contained symlinks.
  Tags: resolute dist-upgrade
  Uname: Linux 6.19.0-5-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  VarLogDistupgradeTermlog:
   
  _MarkForUpload: True
  mtime.conffile..etc.apport.crashdb.conf: 2025-12-13T23:32:16.322793

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