Comment 1 for bug 876972

Thanks for reporting this bug. I'm assigning this report to the "unity" package, as this is what I presume you are using. If not please change the package to the appropriate desktop you are using.

Once the package is confirmed, lease execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 876972
When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.