I am experiencing the same problem in a hp compaq 6720s laptop, ubuntu 12.04 dual boot with win vista:
When laptop on ac adapter, I can shutdown the computer from menu or command line (sudo poweroff ) without any problem, but when on battery, the laptop doesn't shutdown, it remains in splash screen showing ubuntu logo and dots going from red to white forever, neither trying from command line. Laptop doesn't respond to any combination key : Alt+SysRq RESUIB or CTRL+alt+del. I have to poweroff the computer pressing the turn on/off button -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1010981 Title: Computer does not power off when attempting to shut down by any route. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1010981/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
