[Bug 995195] [NEW] apt-listchanges causes update-manager to appear to hang

[Malcolm Scott]

Public bug reported:

If apt-listchanges is configured to show package changelogs, update-
manager displays them in 'less' in a hidden terminal which waits for the
user to quit and continue.  There is no indication in update-manager
that something off-screen is waiting for input.  The only status message
reads "Applying changes".

To continue, the user must click 'Details' then interact with apt-
listchanges in the terminal.

Screenshots attached.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sat May  5 18:51:55 2012
GsettingsChanges:
 com.ubuntu.update-manager check-new-release-ignore 'oneiric'
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1336240007
 com.ubuntu.update-manager window-height 600
 com.ubuntu.update-manager window-width 600
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to precise on 2012-05-03 (2 days ago)

** Affects: apt-listchanges (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise third-party-packages

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https://bugs.launchpad.net/bugs/995195

Title:
  apt-listchanges causes update-manager to appear to hang

Status in “apt-listchanges” package in Ubuntu:
  New
Status in “update-manager” package in Ubuntu:
  New

Bug description:
  If apt-listchanges is configured to show package changelogs, update-
  manager displays them in 'less' in a hidden terminal which waits for
  the user to quit and continue.  There is no indication in update-
  manager that something off-screen is waiting for input.  The only
  status message reads "Applying changes".

  To continue, the user must click 'Details' then interact with apt-
  listchanges in the terminal.

  Screenshots attached.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.1
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
  Uname: Linux 3.2.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  Date: Sat May  5 18:51:55 2012
  GsettingsChanges:
   com.ubuntu.update-manager check-new-release-ignore 'oneiric'
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1336240007
   com.ubuntu.update-manager window-height 600
   com.ubuntu.update-manager window-width 600
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to precise on 2012-05-03 (2 days ago)

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