[Bug 1059473] Re: ubiquity (or grub-probe )installer hang on install

[juniper]

workaround: killing grub-mount (killall grub-mount) permits to end
installation

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https://bugs.launchpad.net/bugs/1059473

Title:
  ubiquity (or grub-probe )installer hang on install

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  install from usb stick;

  ubiquity fail to install grub:

  Oct  1 09:28:27 ubuntu os-prober: File descriptor 3 (pipe:[50287]) leaked on lvs invocation.
  Oct  1 09:28:27 ubuntu os-prober:  Parent PID 10239: log-output
  Oct  1 09:28:27 ubuntu os-prober:   No volume groups found
  Oct  1 09:28:27 ubuntu os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sda2
  Oct  1 09:28:27 ubuntu 50mounted-tests: debug: /dev/sda2 type not recognised; skipping
  Oct  1 09:28:27 ubuntu os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
  Oct  1 09:28:27 ubuntu os-prober: debug: /dev/sda5: is active swap
  Oct  1 09:28:27 ubuntu os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sdb1
  Oct  1 09:28:28 ubuntu ubiquity: grub-probe: error:
  Oct  1 09:28:28 ubuntu ubiquity:
  Oct  1 09:28:28 ubuntu ubiquity: cannot find a GRUB drive for /dev/sdb1.  Check your device.map
  Oct  1 09:28:28 ubuntu ubiquity: .

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: ubiquity 2.12.6
  ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4
  Uname: Linux 3.5.0-16-generic x86_64
  ApportVersion: 2.5.3-0ubuntu1
  Architecture: amd64
  CasperVersion: 1.325
  Date: Mon Oct  1 11:39:18 2012
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- keyboard-configuration/layoutcode=it
  InterpreterPath: /usr/bin/python3.2mu
  LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20120930)
  ProcEnviron:
   TERM=unknown
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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