Ubuntu 13.10 to 14.04: failed to upgrade libsmbclient:amd64 with libsmbclient:i386 installed.

[tcedi]

Occurs when calculating changes when using 'update-manager -d -c', as indicated in the testcase.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.5
ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5
Uname: Linux 3.11.0-19-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Wed Apr 16 19:32:32 2014
InstallationDate: Installed on 2012-06-23 (661 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-16 (0 days ago)
VarLogDistupgradeTermlog:

[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

This part of apt.log looks bad.

Installing python-talloc as Dépend of samba-libs
  MarkInstall python-talloc [ i386 ] < none -> 2.1.0-1 > ( python ) FU=0
  Installing python as Dépend of python-talloc
    MarkInstall python [ i386 ] < none -> 2.7.5-5ubuntu3 > ( python ) FU=0
    Installing python2.7 as Dépend of python
      MarkInstall python2.7 [ i386 ] < none -> 2.7.6-8 > ( python ) FU=0
      Installing python2.7-minimal as Dépend of python2.7
        MarkInstall python2.7-minimal [ i386 ] < none -> 2.7.6-8 > ( python ) FU=0
         Removing: python2.7-minimal
          MarkDelete python2.7-minimal [ amd64 ] < 2.7.5-8ubuntu3.1 -> 2.7.6-8 > ( python ) FU=0
       Removing: python2.7
        MarkDelete python2.7 [ amd64 ] < 2.7.5-8ubuntu3.1 -> 2.7.6-8 > ( python ) FU=0
    Installing python-minimal as Dépend of python
      MarkInstall python-minimal [ i386 ] < none -> 2.7.5-5ubuntu3 > ( python ) FU=0
       Removing: python-minimal
        MarkDelete python-minimal [ amd64 ] < 2.7.5-5ubuntu1 -> 2.7.5-5ubuntu3 > ( python ) FU=0
    Installing libpython-stdlib as Dépend of python
      MarkInstall libpython-stdlib [ i386 ] < none -> 2.7.5-5ubuntu3 > ( python ) FU=0
     Removing: python
      MarkDelete python [ amd64 ] < 2.7.5-5ubuntu1 -> 2.7.5-5ubuntu3 > ( python ) FU=0
   Removing: python-talloc
    MarkDelete python-talloc [ amd64 ] < none -> 2.1.0-1 > ( python ) FU=0

apt tries (and fails ) to upgrade the full python:i386 stack because libsmbclient:i386 is installed. Instead it should probably prefer the native arch, upgrade amd64 packages and remove i386 ones.

Setting to confirmed.

[Jean-Baptiste Lallement (jibel)]

I confirmed on IRC with the OP that u-r-u could calculate the upgrade after libsmbclient:i386 has been removed.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1308657

[Brian Murray (brian-murray)]

Is this due to the same issue as bug 1307904?

[Jean-Baptiste Lallement (jibel)]

I am not sure because in 1307904 grep was not installed at all, while in this case apt selects the foreign arch rather than the native arch.

[tcedi (t-administrator-tcedi-com)]

No, I don't think that this is due to the same issue as bug 1307904. I've looked at it before filing the bug...
The workaround provided by jibel works like a charm.
I just had to remove libsmbclient:i386 to be able to perform the upgrade without a hitch!

[Michael Vogt (mvo)]

It seems the root cause of the problem is that libsmbclient:i386 and libsmbclient:amd64 can be co-installed in saucy but this is no longer possible with trusty. This appears to be because of the switch to samba4 that introduced a dependency on samba-libs which in turn adds python-talloc which is not multiarched.

[Michael Vogt (mvo)]

It turns out that samba-libs contains a shared library that depends on the libpytalloc-util.so.2 library from python-talloc:

$ ldd /usr/lib/x86_64-linux-gnu/samba/libsamba_python.so.0 | grep libpytalloc-util
 libpytalloc-util.so.2 => /usr/lib/x86_64-linux-gnu/libpytalloc-util.so.2 (0x00007f0603701000)

So we can either:
  - move /usr/lib/x86_64-linux-gnu/samba/libsamba_python.so.0 to samba-python
  - move libpytalloc-util.so.2 to libtalloc2
to get libsmbclient upgradable.