[Bug 2150861] Re: error upgrading from 24.04 to 26.04 libreoffice-core:amd64 libxmlsec1-1:amd64

[Daniel Tang]

To fix this problem run:

```bash
sudo apt remove libxmlsec1-nss libxmlsec1t64-nss libxmlsec1 libxmlsec1t64
```

### Analysis

```
Investigating (1) libxmlsec1-nss1:amd64 < none -> 1.3.9-1 @un uN Ib >
Broken libxmlsec1-nss1:amd64 Конфликтует on libxmlsec1-nss:amd64 < none @un H >
  Considering libxmlsec1t64-nss:amd64 11 as a solution to libxmlsec1-nss1:amd64 0
  MarkKeep libxmlsec1-nss1:amd64 < none -> 1.3.9-1 @un uN Ib > FU=0
  Holding Back libxmlsec1-nss1:amd64 rather than change libxmlsec1-nss:amd64
```

My 26.04:
+ libxmlsec1-nss1
- libxmlsec1-nss
- libxmlsec1t64-nss

```
Investigating (1) libxmlsec1-1:amd64 < none -> 1.3.9-1 @un uN Ib >
Broken libxmlsec1-1:amd64 Конфликтует on libxmlsec1:amd64 < none @un H >
  Considering libxmlsec1t64:amd64 14 as a solution to libxmlsec1-1:amd64 0
  MarkKeep libxmlsec1-1:amd64 < none -> 1.3.9-1 @un uN Ib > FU=0
  Holding Back libxmlsec1-1:amd64 rather than change libxmlsec1:amd64
```

My 26.04:
+ libxmlsec1-1
- libxmlsec1
- libxmlsec1t64

You probably previously upgraded form 22.04—a release where libxmlsec1
hadn't been renamed to libxmlsec1-1, and didn't remove the old package.

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https://bugs.launchpad.net/bugs/2150861

Title:
  error upgrading from 24.04 to 26.04 libreoffice-core:amd64
  libxmlsec1-1:amd64

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

Bug description:
  do-release-upgrade -d fails with error "can't calculate upgrade". no
  meaningful error message is shown.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: ubuntu-release-upgrader-core 1:24.04.28
  ProcVersionSignature: Ubuntu 6.8.0-111.111-generic 6.8.12
  Uname: Linux 6.8.0-111-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CrashReports: 640:1000:125:74171592:2026-05-04 07:16:32.821683553 +0300:2026-05-04 07:16:27.393629568 +0300:/var/crash/_opt_google_chrome_chrome.1000.crash
  CurrentDesktop: KDE
  Date: Mon May  4 13:31:25 2026
  InstallationDate: Installed on 2022-02-11 (1543 days ago)
  InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to noble on 2026-05-04 (0 days ago)
  VarLogDistupgradeAptHistorylog:
   Start-Date: 2026-05-04  13:25:35
   Requested-By: sch (1000)
   End-Date: 2026-05-04  13:25:35
  VarLogDistupgradeApttermlog:
   Log started: 2026-05-04  13:25:35
   Log ended: 2026-05-04  13:25:35

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