[Bug 1241684] Re: Upgrade 13.04 to 13.10 Fail real-time signal 0

[D. Hugh Redelmeier]

I think I hit this too.

Very puzzling because I first I used the GUI without invoking it from a
terminal.  It worked for a while and then silently went away. Not even
an oil slick.

When I invoked it from a terminal (sudo update-manager -d) it had this
"Signal 0" message (which makes no sense to me since there is no signal
0 -- signals start at 1).

This was enough for me to google and get here.  But no solution was
presented here, so I went to <https://bugs.launchpad.net/ubuntu/+source
/ubuntu-release-upgrader/+bug/1203534> (thanks Kelly).

>From there I learned that the proprietary nVidia driver was the trigger
for the problem.  I searched in vain for a GUI tool to switch back to
Nouveau (there used to be one in Settings: Hardware, but no more --
pity!).  I tried the canned apt-get commands but they didn't work.

What appears to be working is using the command "do-release-upgrade".
Thanks to <https://launchpad.net/~ric-almeida> for mentioning this in
1203534

Unfortunately, because do-release-upgrade is working (as I type this), I
cannot go back and capture precise information about the "sudo update-
manager -d" failure.

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https://bugs.launchpad.net/bugs/1241684

Title:
  Upgrade 13.04 to 13.10 Fail real-time signal 0

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  I clicked upgrade button on update-manager window
  System prompted for authentication
  release note panel appeared, clicked upgrade button
  a download panel appeared briefly, upgrade does not proceed

  In a command window:
  xxxxxx at DeskTop:~$ update-manager
  Checking for a new Ubuntu release
  authenticate 'saucy.tar.gz' against 'saucy.tar.gz.gpg' 
  extracting 'saucy.tar.gz'
  Real-time signal 0
  xxxxxx at DeskTop:~$

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: update-manager 1:0.186.2
  ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
  Uname: Linux 3.8.0-31-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  Date: Fri Oct 18 16:46:02 2013
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-time' b'1382106783'
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'600'
   b'com.ubuntu.update-manager' b'window-width' b'600'
  InstallationDate: Installed on 2011-11-01 (716 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)

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