[Bug 1055967] Re: ubiquity kde frontend is broken in current kubuntu daily builds

[Adam Conrad]

Hello Pantelis, or anyone else affected,

Accepted ubiquity into precise-proposed. The package will build now and
be available at http://launchpad.net/ubuntu/+source/ubiquity/2.10.21 in
a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please change the bug tag from
verification-needed to verification-done.  If it does not, change the
tag to verification-failed.  In either case, details of your testing
will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: ubiquity (Ubuntu Precise)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1055967

Title:
  ubiquity kde frontend is broken in current kubuntu daily builds

Status in “ubiquity” package in Ubuntu:
  Fix Released
Status in “ubiquity” source package in Precise:
  Fix Committed
Status in “ubiquity” source package in Quantal:
  Fix Released

Bug description:
  How to repeat:

  1) Get e.g., http://cdimage.ubuntu.com/kubuntu/precise/daily-
  live/20120924.1/precise-desktop-amd64.iso

  2) Try to boot it in a VM (qemu/KVM or virtualbox should do fine)

  3) Experience the crash

  
  Please don't ask stacktrace etc since I can't get any (it refuses to load any debug information,
  --pdb doesn't seem to work either).

  A little debugging with --debug shows:
  kubuntu-ubiquity(3341)/kdeui (kdelibs): Session bus not found

  12.04.1 livecd works fine. The major change between that version and now was KDE
  4.8.4 -> 4.8.5 and a small update in dbus-x11 (but my hunch is that the first is the culprit).

  I think the problem is that KDE added a new way to (try to) access the session bus
  under the hood, at a time when ubiquity doesn't expect and so is running as root,
  causing the problem.

  strace shows many -EAGAINs in what seems to be D-bus communication before
  the crash, which seems to support this.

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