Bug 443867 - acpi generates lot of interrupts according to powertop
acpi generates lot of interrupts according to powertop
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
x86_64 Linux
low Severity low
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2008-04-23 15:28 EDT by Juha Heljoranta
Modified: 2009-07-14 11:45 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2009-07-14 11:45:28 EDT
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Attachments (Terms of Use)
dmidecode (serial and uuid removed from system information) (10.24 KB, text/plain)
2008-04-23 15:28 EDT, Juha Heljoranta
no flags Details

  None (edit)
Description Juha Heljoranta 2008-04-23 15:28:15 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):
Actual results:
lot of acpi generated interrupts

Expected results:
reasonable amount of interrupts from acpi

Additional info:
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.
Comment 1 Juha Heljoranta 2008-04-23 15:28:15 EDT
Created attachment 303541 [details]
dmidecode (serial and uuid removed from system information)
Comment 2 Bug Zapper 2008-05-14 06:01:45 EDT
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
Comment 3 Bug Zapper 2009-06-09 20:23:09 EDT
This message is a reminder that Fedora 9 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 9.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '9'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 9's end of life.

Bug Reporter: Thank you for reporting this issue and we are sorry that 
we may not be able to fix it before Fedora 9 is end of life.  If you 
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The process we are following is described here: 
Comment 4 Bug Zapper 2009-07-14 11:45:28 EDT
Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

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