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* Understand UNIX(R) and FreeBSD basics (crossref:basics[basics,FreeBSD Basics]). * Understand UNIX(R) and FreeBSD basics (crossref:basics[basics,FreeBSD Basics]).
* Be familiar with the basics of kernel configuration and compilation (crossref:kernelconfig[kernelconfig,Configuring the FreeBSD Kernel]). * Be familiar with the basics of kernel configuration and compilation (crossref:kernelconfig[kernelconfig,Configuring the FreeBSD Kernel]).
[[configtuning-starting-services]] [[configtuning-starting-services]]
== Starting Services == Starting Services
Many users install third party software on FreeBSD from the Ports Collection and require the installed services to be started upon system initialization. Many users install third party software on FreeBSD from the Ports Collection and require the installed services to be started upon system initialization.
Services, such as package:mail/postfix[] or package:www/apache22[] are just two of the many software packages which may be started during system initialization. Services, such as package:mail/postfix[] or package:www/apache24[] are just two of the many software packages which may be started during system initialization.
This section explains the procedures available for starting third party software. This section explains the procedures available for starting third party software.
In FreeBSD, most included services, such as man:cron[8], are started through the system startup scripts. In FreeBSD, most included services, such as man:cron[8], are started through the system startup scripts.
=== Extended Application Configuration === Extended Application Configuration
Now that FreeBSD includes [.filename]#rc.d#, configuration of application startup is easier and provides more features. Now that FreeBSD includes [.filename]#rc.d#, configuration of application startup is easier and provides more features.
Using the key words discussed in <<configtuning-rcd>>, applications can be set to start after certain other services and extra flags can be passed through [.filename]#/etc/rc.conf# in place of hard coded flags in the startup script. Using the key words discussed in <<configtuning-rcd>>, applications can be set to start after certain other services and extra flags can be passed through [.filename]#/etc/rc.conf# in place of hard coded flags in the startup script.
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ACPI and APM cannot coexist and should be used separately. ACPI and APM cannot coexist and should be used separately.
The last one to load will terminate if the driver notices the other is running. The last one to load will terminate if the driver notices the other is running.
==== ====
ACPI can be used to put the system into a sleep mode with `acpiconf`, the `-s` flag, and a number from `1` to `5`. ACPI can be used to put the system into a sleep mode with `acpiconf`, the `-s` flag, and a number from `1` to `5`.
Most users only need `1` (quick suspend to RAM) or `3` (suspend to RAM). Most users only need `1` (quick suspend to RAM) or `3` (suspend to RAM).
Option `5` performs a soft-off which is the same as running `halt -p`. Option `5` performs a soft-off which is the same as running `halt -p`.
The man:acpi_video[4] driver uses link:https://uefi.org/specs/ACPI/6.4/Apx_B_Video_Extensions/Apx_B_Video_Extensions.html[ACPI Video Extensions] to control display switching and backlight brightness. The man:acpi_video[4] driver uses link:https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/Apx_B_Video_Extensions/Apx_B_Video_Extensions.html[ACPI Video Extensions] to control display switching and backlight brightness.
It must be loaded after any of the DRM kernel modules. It must be loaded after any of the DRM kernel modules.
After loading the driver, the kbd:[Fn] brightness keys will change the brightness of the screen. After loading the driver, the kbd:[Fn] brightness keys will change the brightness of the screen.
It is possible to check the ACPI events by inspecting [.filename]#/var/run/devd.pipe#: It is possible to check the ACPI events by inspecting [.filename]#/var/run/devd.pipe#:
[source,shell] [source,shell]
... ...
# cat /var/run/devd.pipe # cat /var/run/devd.pipe
!system=ACPI subsystem=Video type=brightness notify=62 !system=ACPI subsystem=Video type=brightness notify=62
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Do not send a PR without emailing {freebsd-acpi} first as it is likely that the problem has been reported before. Do not send a PR without emailing {freebsd-acpi} first as it is likely that the problem has been reported before.
[[ACPI-References]] [[ACPI-References]]
=== References === References
More information about ACPI may be found in the following locations: More information about ACPI may be found in the following locations:
* The FreeBSD ACPI Mailing List Archives (https://lists.freebsd.org/pipermail/freebsd-acpi/[https://lists.freebsd.org/pipermail/freebsd-acpi/]) * The FreeBSD ACPI Mailing List Archives (https://lists.freebsd.org/pipermail/freebsd-acpi/[https://lists.freebsd.org/pipermail/freebsd-acpi/])
* The ACPI 2.0 Specification (http://acpi.info/spec.htm[http://acpi.info/spec.htm]) * The ACPI 6.4 Specification (https://uefi.org/sites/default/files/resources/ACPI_Spec_6_4_Jan22.pdf[https://uefi.org/sites/default/files/resources/ACPI_Spec_6_4_Jan22.pdf])
* man:acpi[4], man:acpi_thermal[4], man:acpidump[8], man:iasl[8], and man:acpidb[8] * man:acpi[4], man:acpi_thermal[4], man:acpidump[8], man:iasl[8], and man:acpidb[8]