I've since confirmed that this problem only occurs when the AC power is plugged into the computer. If I plug in the AC adapter AFTER booting, I can keep hyperthreading working. I've only tried this for a little while at a time, so it's unclear if there's other side-effects.
-- HP-2140 won't boot with dual-core enabled https://bugs.launchpad.net/bugs/376728 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs