package libxvmc1 2:1.0.9-1ubuntu1 failed to install/upgrade: trying to overwrite shared '/etc/X11/XvMCConfig', which is different from other instances of package libxvmc1:amd64

[David Kastrup]

Upgrade attempt. Basic installation is Ubuntu Studio amd64.

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: libxvmc1 2:1.0.9-1ubuntu1
ProcVersionSignature: Ubuntu 4.12.0-12.13-lowlatency 4.12.8
Uname: Linux 4.12.0-12-lowlatency x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Wed Sep 6 11:29:45 2017
DistUpgraded: Fresh install
DistroCodename: artful
DistroVariant: ubuntu
DkmsStatus:
 tp_smapi, 0.42, 4.12.0-11-lowlatency, x86_64: installed
 tp_smapi, 0.42, 4.12.0-12-lowlatency, x86_64: installed
 v4l2loopback, 0.10.0, 4.12.0-11-lowlatency, x86_64: installed
 v4l2loopback, 0.10.0, 4.12.0-12-lowlatency, x86_64: installed
DuplicateSignature:
 package:libxvmc1:2:1.0.9-1ubuntu1
 Unpacking libxvmc1:amd64 (2:1.0.10-1) over (2:1.0.9-1ubuntu1) ...
 dpkg: error processing archive /tmp/apt-dpkg-install-uVoBwf/68-libxvmc1_2%3a1.0.10-1_amd64.deb (--unpack):
  trying to overwrite shared '/etc/X11/XvMCConfig', which is different from other instances of package libxvmc1:amd64
ErrorMessage: trying to overwrite shared '/etc/X11/XvMCConfig', which is different from other instances of package libxvmc1:amd64
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
   Subsystem: Lenovo ThinkPad T61/R61 [17aa:20b5]
   Subsystem: Lenovo ThinkPad T61/R61 [17aa:20b5]
InstallationDate: Installed on 2011-10-14 (2153 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
MachineType: LENOVO 7661LN8
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.12.0-12-lowlatency root=UUID=a5b30f2d-d555-4bea-9b89-e322f13656be ro quiet splash threadirqs resume=UUID=29869a91-5410-4e9b-9bd9-2aea1ecb1637 vt.handoff=7
Python3Details: /usr/bin/python3.6, Python 3.6.2, python3-minimal, 3.6.1-0ubuntu3
PythonDetails: /usr/bin/python2.7, Python 2.7.13, python-minimal, 2.7.13-2
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5~rc1~ubuntu1
SourcePackage: libxvmc
Title: package libxvmc1 2:1.0.9-1ubuntu1 failed to install/upgrade: trying to overwrite shared '/etc/X11/XvMCConfig', which is different from other instances of package libxvmc1:amd64
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/18/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LETC9WW (2.29 )
dmi.board.name: 7661LN8
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: 000L004051
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7LETC9WW(2.29):bd03/18/2011:svnLENOVO:pn7661LN8:pvrThinkPadT61:rvnLENOVO:rn7661LN8:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T61
dmi.product.name: 7661LN8
dmi.product.version: ThinkPad T61
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.82-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.0~rc4-0ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.0~rc4-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[David Kastrup (dak)]

Ok, this looks really strange:

dak@lola:/usr/local/tmp/lilypond$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  libxvmc1
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/13.7 kB of archives.
After this operation, 19.5 kB disk space will be freed.
Do you want to continue? [Y/n]
(Reading database ... 353836 files and directories currently installed.)
Preparing to unpack .../libxvmc1_2%3a1.0.10-1_amd64.deb ...
Unpacking libxvmc1:amd64 (2:1.0.10-1) over (2:1.0.9-1ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/libxvmc1_2%3a1.0.10-1_amd64.deb (--unpack):
 trying to overwrite shared '/etc/X11/XvMCConfig', which is different from other instances of package libxvmc1:amd64
Errors were encountered while processing:
 /var/cache/apt/archives/libxvmc1_2%3a1.0.10-1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
dak@lola:/usr/local/tmp/lilypond$ dpkg -S !$
dpkg -S /etc/X11/XvMCConfig
libxvmc1:i386: /etc/X11/XvMCConfig
dak@lola:/usr/local/tmp/lilypond$ sudo apt-get remove libxvmc1:i386
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'libxvmc1:i386' is not installed, so not removed. Did you mean 'libxvmc1'?
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
dak@lola:/usr/local/tmp/lilypond$ cat /etc/X11/XvMCConfig
libXvMC.so.1
dak@lola:/usr/local/tmp/lilypond$

[David Kastrup (dak)]

So I _purged_ the already removed libxvmc1:i386 (no idea how it actually got installed though) and then libxvmc1 (:amd64) updated/installed fine. Very peculiar.