It was suggested to me out of band to look at the output of powertop. So I enabled C States in the BIOS and got Jaunty running again (hitting the power switch 30-some times and the Ctrl key on the keyboard 500-some times to create interrupts to get it to where I could run powertop.
powertop showed the system was in the C3 state some of the time. It reported interrupts from hpet3, hpet2, uhci_hcd:usb4, uhci_hcd:usb7, and Dell Laser mouse. But it ONLY would refresh when I did something with the keyboard or mouse to get interrupts. The HPET 3 and HPET 2 interrupts are NOT waking the system out of the C3 state. Once a keyboard or mouse actually DOES wake the system, the enqueued HPET interrupt is handled. ---- When I boot the same Jaunty LiveCD and add "hpet=disable" the output of powertop seems quite sensible. It updates correctly. It says that the system is spending nearly all of its time in state C3 with 60% of the interrupts coming from something called, "<interrupt> extra timer interrupt". The next most frequent source of interrupts is "hr timer_start (tick_sched_timer)". Given this data from powertop, do you folks think we're talking a BIOS bug, a hardware bug, or a Linux bug? -- Jaunty will not boot on Dell Optiplex 760 unless hpet=disable https://bugs.launchpad.net/bugs/348694 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
