[Bug 1748293] [NEW] Handling of images exceeding maximums need to be friendlier and more informative

[Scott Cowles Jacobs]

Public bug reported:

I have been working (with Hugin) on images that can get rather long (or
high, presumably).

I had a problem with my Blu-Ray player not showing an image that seemed
almost identical to one id did show, and thought I'd try to see what was
different about the two...

I used identify to try and see the specs of the respective images, and
was surprised to see an "error" message about width or height exceeding
maximums.

I eventually found that I could modify policy.xml to increase the size
maximums, but only after googling and searching around.  Nothing printed
in the terminal indicated that I could do anything about solving the
problem myself, and that it was not in fact a bug.

Display was even worse - When I selected it from the context menu, the
ImageMagick logo and wizard were shown, but nothing else ever happened.

I think some sort of window or text (depending on whether the programs
were launched from the terminal or GUI), should appear that either
directly suggests changing policy.xml, or lists a website that
tells/shows how to solve the issue.

Not saying something seems to tell the user that the program has a bug,
or that there is nothing to be done about the problem.

---------------------------------------------------------
scott at scott-Asus-M2N68-AM-PLUS:~$ uname -a
Linux scott-Asus-M2N68-AM-PLUS 4.13.0-32-generic #35-Ubuntu SMP Thu Jan 25 09:13:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
scott at scott-Asus-M2N68-AM-PLUS:~$ lsb_release -dsc
Ubuntu 17.10
artful
scott at scott-Asus-M2N68-AM-PLUS:~$ echo $DESKTOP_SESSION
QLubuntu

scott at scott-Asus-M2N68-AM-PLUS:~$ apt-cache policy imagemagick-6.q16
imagemagick-6.q16:
  Installed: 8:6.9.7.4+dfsg-16ubuntu2
  Candidate: 8:6.9.7.4+dfsg-16ubuntu2
  Version table:
 *** 8:6.9.7.4+dfsg-16ubuntu2 500
        500 http://us.archive.ubuntu.com/ubuntu artful/main amd64 Packages
        100 /var/lib/dpkg/status

---------------------------------------------------------

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: imagemagick-6.q16 8:6.9.7.4+dfsg-16ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: LXQt
Date: Thu Feb  8 15:28:03 2018
InstallationDate: Installed on 2017-11-06 (94 days ago)
InstallationMedia: Lubuntu-Next 17.10 "Artful Aardvark" - Beta amd64 (20171014)
SourcePackage: imagemagick
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: imagemagick (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

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https://bugs.launchpad.net/bugs/1748293

Title:
  Handling of images exceeding maximums need to be friendlier and more
  informative

Status in imagemagick package in Ubuntu:
  New

Bug description:
  I have been working (with Hugin) on images that can get rather long
  (or high, presumably).

  I had a problem with my Blu-Ray player not showing an image that
  seemed almost identical to one id did show, and thought I'd try to see
  what was different about the two...

  I used identify to try and see the specs of the respective images, and
  was surprised to see an "error" message about width or height
  exceeding maximums.

  I eventually found that I could modify policy.xml to increase the size
  maximums, but only after googling and searching around.  Nothing
  printed in the terminal indicated that I could do anything about
  solving the problem myself, and that it was not in fact a bug.

  Display was even worse - When I selected it from the context menu, the
  ImageMagick logo and wizard were shown, but nothing else ever
  happened.

  I think some sort of window or text (depending on whether the programs
  were launched from the terminal or GUI), should appear that either
  directly suggests changing policy.xml, or lists a website that
  tells/shows how to solve the issue.

  Not saying something seems to tell the user that the program has a
  bug, or that there is nothing to be done about the problem.

  ---------------------------------------------------------
  scott at scott-Asus-M2N68-AM-PLUS:~$ uname -a
  Linux scott-Asus-M2N68-AM-PLUS 4.13.0-32-generic #35-Ubuntu SMP Thu Jan 25 09:13:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
  scott at scott-Asus-M2N68-AM-PLUS:~$ lsb_release -dsc
  Ubuntu 17.10
  artful
  scott at scott-Asus-M2N68-AM-PLUS:~$ echo $DESKTOP_SESSION
  QLubuntu

  scott at scott-Asus-M2N68-AM-PLUS:~$ apt-cache policy imagemagick-6.q16
  imagemagick-6.q16:
    Installed: 8:6.9.7.4+dfsg-16ubuntu2
    Candidate: 8:6.9.7.4+dfsg-16ubuntu2
    Version table:
   *** 8:6.9.7.4+dfsg-16ubuntu2 500
          500 http://us.archive.ubuntu.com/ubuntu artful/main amd64 Packages
          100 /var/lib/dpkg/status

  ---------------------------------------------------------

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: imagemagick-6.q16 8:6.9.7.4+dfsg-16ubuntu2
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: LXQt
  Date: Thu Feb  8 15:28:03 2018
  InstallationDate: Installed on 2017-11-06 (94 days ago)
  InstallationMedia: Lubuntu-Next 17.10 "Artful Aardvark" - Beta amd64 (20171014)
  SourcePackage: imagemagick
  UpgradeStatus: No upgrade log present (probably fresh install)

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