Another update. The idle=poll option was more of a power hog than I realized. I actually ended up going back to nolapic a few days after I used it. After the electricity ran out much, MUCH faster than it should have.
The most recent thing I looked into is the max cstate options. processor.max_cstate didn't seem to work. Though intel_idle.max_cstate does work. I am able to use up to intel_idle.max_cstate=2. This is what I now have as my default boot option. Power usage seems to be acceptable and I am able to see all my cores. When I try intel_idle.max_cstate=3 it fails in the same way as when there are no boot options. So cstate 3 seems to be where the issue lies, as far as I can tell. I do not know how to debug this problem though. Is anyone still watching this bug report? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1336451 Title: Cannot boot/run ubuntu without "acpi=off" or "nolapic" or "idle=poll". Freezes otherwise. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1336451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
