Bug 145133 - ACPI button recognized but does not work
ACPI button recognized but does not work
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
Depends On:
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Reported: 2005-01-14 12:19 EST by Jurgen Kramer
Modified: 2015-01-04 17:15 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-10-28 12:22:43 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Jurgen Kramer 2005-01-14 12:19:59 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5)
Gecko/20041111 Firefox/1.0

Description of problem:
On my HP TC1100 (Tablet PC) the ACPI power button is recognized but
pressing it does not result in a proper button/power event which can
be used by acpid to power down the machine.

Running the kernel with ACPI debugging enabled shows some GPE activity
when I press the button.

BTW the button does not work with previous kernel versions either.

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

How reproducible:

Steps to Reproduce:
1. Press power button when booted in FC3
2. == nothing happens ==

Actual Results:  Nothing happens. /var/log/acpid does not show the
expected event.

Expected Results:  Machine should power down via ACPI event.

Additional info:
Comment 1 Dave Jones 2005-07-15 16:05:07 EDT
An update has been released for Fedora Core 3 (kernel-2.6.12-1.1372_FC3) which
may contain a fix for your problem.   Please update to this new kernel, and
report whether or not it fixes your problem.

If you have updated to Fedora Core 4 since this bug was opened, and the problem
still occurs with the latest updates for that release, please change the version
field of this bug to 'fc4'.

Thank you.
Comment 2 Jurgen Kramer 2005-07-16 06:11:59 EDT
I've updated to kernel 2.6.12-1.1372. Unfortunately pressing the power button
does not result in a button/power ACPI event. I can only see battery events in
Comment 3 Jurgen Kramer 2005-10-28 12:22:43 EDT
More current kernels seem to detect the power button twice:

ACPI: Power Button (FF) [PWRF]
ACPI: Power Button (CM) [PWRB]

Checking the acpid logs, the latter seems to be responsible for the now working
power button..case closed!

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