doc: Extend tlp-service-type example.

* doc/guix.texi (Power Management Services): Demonstrate
tlp-configuration usage.

Suggested by rovanion on #guix.
parent 6fdd40b3
......@@ -23626,17 +23626,17 @@ source is detected. More information can be found at
@uref{https://linrunner.de/en/tlp/tlp.html, TLP home page}.
@deffn {Scheme Variable} tlp-service-type
The service type for the TLP tool. Its value should be a valid
TLP configuration (see below). To use the default settings, simply
write:
The service type for the TLP tool. The default settings are optimised
for battery life on most systems, but you can tweak them to your heart's
content by adding a valid @code{tlp-configuration}:
@lisp
(service tlp-service-type)
(service tlp-service-type
(tlp-configuration
(cpu-scaling-governor-on-ac (list "performance"))
(sched-powersave-on-bat? #t)))
@end lisp
@end deffn
By default TLP does not need much configuration but most TLP parameters
can be tweaked using @code{tlp-configuration}.
Each parameter definition is preceded by its type; for example,
@samp{boolean foo} indicates that the @code{foo} parameter
should be specified as a boolean. Types starting with
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