I'm not 100% sure if it's this bug or not but I'm having problem which looks like that on Xubuntu 8.10 on very old laptop hardware MiTAC-6133.
"cat /proc/acpi/processor/CPU0/power" says: active state: C0 max_cstate: C7 (or C8, not sure) ... and I have: C0 (cpu running) (100%) C1 0,0ms (0%) C2 0,0ms (0%) C3 0,0ms (0%) Which is indeed just like it shows even if my CPU usage is only ~1-2% becase I have CPU Fan running at full speed with ACPI turned ON. When I boot _without_ ACPI CPU Fan is working just like it should - only when CPU usage is high. To use ACPI I have to boot with "acpi=force" option passed to kernel because of BIOS older than year 1999. Besides this CPU idle states all ACPI features work great - CPU throttling, Lid button, Power button, Sleep, Battery status, Power off, etc. -- Powertop reports that CPU state is C0 100% of the time, regardless of number of wakeups https://bugs.launchpad.net/bugs/176553 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
