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thermostat
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Author SHA1 Message Date
Dustin a48fd74a15 Add backlight daemon 
The backlight on the CM3-PANEL cannot be controled with normal DPMS.  Instead,
the brightness is set using PWM on GPIO pin 22.  The
`thermostat.backlight` program runs as a background process to manage
the PWM duty cycle.  It exposes a D-Bus service to allow other programs
to control the backlight.  It also watches for *xscreensaver* events to
detect when the screen is blanked and disable the backlight.
 2021-04-29 22:19:47 -05:00