Red Hat Bugzilla – Bug 443867
acpi generates lot of interrupts according to powertop
Last modified: 2009-07-14 11:45:28 EDT
Description of problem:
PowerTOP shows large amount of interrupts generated by acpi:
Wakeups-from-idle per second : 278.8 interval: 10.0s
Power usage (ACPI estimate): 20.2W (2.1 hours)
Top causes for wakeups:
91.9% (2544.1) <interrupt> : acpi
3.0% ( 82.3) <interrupt> : uhci_hcd:usb3, i915@pci:0000:00:02.0
1.8% ( 49.6) <kernel IPI> : Rescheduling interrupts
This causes laptop battery to drain fast while doing nothing.
Version-Release number of selected component (if applicable):
lot of acpi generated interrupts
reasonable amount of interrupts from acpi
According to top the kacpid eats constantly over 4 % of the cpu:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
64 root 15 -5 0 0 0 S 4.3 0.0 1:10.62 kacpid
Same problem is also in F8.
Created attachment 303541 [details]
dmidecode (serial and uuid removed from system information)
Changing version to '9' as part of upcoming Fedora 9 GA.
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