[Bug 887879] Re: ubiquity crashed with ValueError in raw_decode(): No JSON object could be decoded

[Jonathan Reed]

I encountered this earlier in the installation, from a 12.04.1 CD
install, and the traceback was in /usr/lib/ubiquity/plugins/ubi-
timezone.py, line 173.

Based on this and some other bugs, it seems like working network is a
hard requirement for Ubiquity, not just a "for best results" as
described on the installation page.  It's also possible that ubiquity's
network detection code should be more robust.  In my (and many academic
environments), you get a crippled network connection, redirecting you to
a registration page (similar to that found in hotels, free wifi
hotspots, etc).  So to a naive program, it may "look" like a real
network connection, and all host queries will resolve (to the A record
for the registration page), but anything that expects a working network
will be disappointed.

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https://bugs.launchpad.net/bugs/887879

Title:
  ubiquity crashed with ValueError in raw_decode(): No JSON object could
  be decoded

Status in “ubiquity” package in Ubuntu:
  Triaged

Bug description:
  can not be install. found error code 10 about keyboard layout

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: ubiquity 2.8.7
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  CasperVersion: 1.287
  Date: Wed Nov  9 06:34:14 2011
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InterpreterPath: /usr/bin/python2.7
  LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --only
  ProcEnviron: Error: [Errno 13] Permission denied: '/proc/4163/environ'
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--only']
  SourcePackage: ubiquity
  Title: ubiquity crashed with ValueError in raw_decode(): No JSON object could be decoded
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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