Difference between revisions of "Shutdown Pressing Power Button"

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m (Made "acpid" clickable; brings reader to Acpid wiki page.)
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[[Category:Power management (English)]]
#REDIRECT [[Power Management]]
[[Category:HOWTOs (English)]]
{{i18n_entry|English|Shutting system down by pressing the power button}}
{{i18n_entry|Italiano|Arrestare il sistema premendo il pulsante di accensione}}
{{i18n_entry|Русский|Выключение компьютера нажатием кнопки Power}}
{{i18n_entry|Español|Apagar el sistema pulsando el botón de apagado}}
If you want to shutdown your system by simply pressing the power button, do the following:
Install [[acpid]] package, if there is no hal in the DAEMONS array in rc.conf add acpid to it and create a file in ''/etc/acpi/events/'' named ''power'' with following content:
# /etc/acpi/events/power
# This is called when the user presses the power button
event=button/power (PWR.||PBTN)
To be able to test it start the acpid daemon:
/etc/rc.d/acpid start
From now on pressing the power button (lightly, not for few seconds) should properly shutdown the system.
Note that if you have '''hibernate''' configured and working you may want to change the last line with:
However, if you're using more sophisticated WM, you should use its own shutdown call, so it'd save its session etc.
To accomplish it in '''KDE 3''', simply change the action to:
''action=/opt/kde/bin/dcop --all-users --all-sessions ksmserver ksmserver logout 0 2 0''
For '''KDE 4''', dcop is being phased out in favour of dbus, so as well as the above you could also use:
''action=/usr/bin/qdbus org.kde.ksmserver /KSMServer logout 0 2 0''
More information on using dbus is [http://samwiseandthestereotypical.blogspot.com/2008/09/using-dbus-and-ksmserver-to-logout-and.html here]
Likewise for '''XFCE4.4''' change the action line to:
''action=echo POWEROFF | /usr/lib/xfce4/xfsm-shutdown-helper''
Note: For a more robust solution [If you are facing frequent WM crashes or working on a sacrificial PC for developing or testing your software...], you should take a look at "/usr/src/linux/Documentation/sysrq.txt", which is a kernel facility for yielding you [the user...] the CPU so that it could be used for any *rescue* work.

Revision as of 08:17, 27 July 2013

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