Comment 1 for bug 609845

Thank you for taking the time to report this bug and helping to make Ubuntu better. In order to determine if this issue is plymouth related, please boot your computer with plymouth disabled and then shutdown to see if you can reproduce the issue. To disable plymouth for a single boot, follow these steps:

1. Press Esc during Grub boot delay to access the boot menu.
2. Select your actual Ubuntu boot line and press "e" to edit it.
3. Select the "linux" line and at the end of the line, remove "splash" and "quiet".
5. Type "ctrl + x" to boot the custom boot line.

In addition you'd like to assign a package to your report to ensure that it gets looked at by the proper developers. You can learn more about finding the correct package at https://wiki.ubuntu.com/Bugs/FindRightPackage For this report it may be 'plymouth', 'xorg' or 'linux'. Good luck on getting it fixed!