Bug 439669 - 100% CPU Usage
Summary: 100% CPU Usage
Alias: None
Product: Fedora
Classification: Fedora
Component: thinkfinger
Version: 9
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Nobody's working on this, feel free to take it
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2008-03-30 08:00 UTC by Saikat Guha
Modified: 2009-07-14 16:04 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2009-07-14 16:04:42 UTC

Attachments (Terms of Use)

Description Saikat Guha 2008-03-30 08:00:21 UTC
Description of problem:

hald-addon-input is consuming 100% on my ThinkPad X41T tablet PC. The laptop
includes a Wacom Serial Tablet PC Stylus, a Trackpoint, and a keyboard (but no

ps and /proc/<pid>/cmdline return the command line as:
  "hald-addon-input: Listening on /dev/input/event3 /dev/input/event4
/dev/input/event5 /dev/input/event1 /dev/input/event7"
(with the ':' and everything)

Attaching to the process with strace shows a tight poll loop:
  poll([{fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=6, events=POLLIN},
{fd=8, events=POLLIN}, {fd=9, events=POLLIN, revents=POLLNVAL}, {fd=3,
events=POLLIN}, {fd=7, events=POLLIN}], 7, -1) = 1

(note the POLLNVAL for fd=9)

ls /proc/<pid>/fd
only lists fd's 0..8

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.Start X
2.Run top
Actual results:
100% CPU usage. Laptop almost, but not quite, hot enough to fry eggs.

Expected results:
No coagulation of eggs.

Additional info:
Just upgraded to Rawhide using yum on March 30th from an up-to-date and
perfectly working Fedora 8 installation.

Comment 1 Saikat Guha 2008-03-30 09:00:23 UTC
The problem seems to be caused by the thinkfinger (fingerprint reader)

Removing thinkfinger-0.3-8.fc9.i386 temporarily mitigates the problem.

Comment 2 Bug Zapper 2008-05-14 08:26:00 UTC
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 23:56:08 UTC
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bug reports from releases that are no longer maintained.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 
would still like to see this bug fixed and are able to reproduce it 
against a later version of Fedora please change the 'version' of this 
bug to the applicable version.  If you are unable to change the version, 
please add a comment here and someone will do it for you.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events.  Often a 
more recent Fedora release includes newer upstream software that fixes 
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The process we are following is described here: 

Comment 4 Bug Zapper 2009-07-14 16:04:42 UTC
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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