Please try this one: http://people.canonical.com/~khfeng/lp1699004/
I added several messages to debug what code path it took. Grep apst again: $ dmesg | grep -i apst -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1699004 Title: APST gets enabled against explicit kernel option To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1699004/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs