[Bug 859539] Re: usb-creator-gtk fails to install bootloader: "System policy prevents installing the bootloader"

[rduplain]

My latest workaround is to run from the command-line, in a fresh
terminal:

    unset DBUS_SESSION_BUS_ADDRESS 
    sudo usb-creator-gtk --allow-system-internal

This provided a working boot media for me after several repeat runs
hitting the bug in this thread. I am using bash shell (Ubuntu's
default), so change the unset call if you are running a different shell.
I found the variable to unset by running `env | grep -i dbus`.

I found this workaround based on the clue from @cppege-david-9ei9ny
regarding a segfault log in syslog related to dbus. I found this in my
/var/log/syslog:

    May 10 19:40:03 hostname kernel: [ 9015.534921] usb-creator-
gtk[13914]: segfault at 4 ip 00007f2d37ae2820 sp 00007fff9c185c88 error
6 in libdbus-1.so.3.5.8[7f2d37abe000+42000]

OS: Ubuntu 12.04 x86_64 with all system updates applied. I'm running a
dbus/fluxbox X session and not ubuntu-desktop.

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https://bugs.launchpad.net/bugs/859539

Title:
  usb-creator-gtk fails to install bootloader: "System policy prevents
  installing the bootloader"

Status in “usb-creator” package in Ubuntu:
  Confirmed

Bug description:
  When creating USB stick from Ubuntu CD ISO image (or any other
  bootable CD ISO image for that matter) upon finishing copying files
  onto the USB stick I am getting an error message "System policy
  prevents installing the bootloader"followed by password prompt. When I
  enter the password, I get an error message "Failed to install
  bootloader". The result is the USB stick with all necessary files on
  it, but it is not bootable. I do have all administrative rights for
  the account I am using.

  And if I start usb-creator-gtk from a command line after "sudo -s" it
  crashes with a segmentation fault just after copying files onto the
  USB stick.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: usb-creator-gtk 0.2.28.3
  ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
  Uname: Linux 2.6.38-11-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Mon Sep 26 14:18:09 2011
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=ru:en
   LANG=ru_RU.UTF-8
   SHELL=/bin/bash
  SourcePackage: usb-creator
  UpgradeStatus: Upgraded to natty on 2011-04-15 (163 days ago)

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