Public bug reported:
The system say
...An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
....
The reason of upgrade is want to make my ati graphic card MSI R4830 can work,
so I try to many way for that.
but problem remain,still don't work, the system show my graphic driver is
"Gallium 0.4 on i915 (chipset: G33)"
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-81.125-generic 3.13.11-ckt35
Uname: Linux 3.13.0-81-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sun Mar 6 01:55:51 2016
InstallationDate: Installed on 2013-07-18 (961 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-03-05 (0 days ago)
mtime.conffile..etc.update.manager.release.upgrades: 2016-03-06T01:46:46.146354
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade trusty
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https://bugs.launchpad.net/bugs/1553544
Title:
Could not calculate the upgrade
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