Raspberry Pi/Quick Reference
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You can use tvservice to turn the monitors on and off, however, turning them back on and displaying the signal is a bit tricky. | You can use tvservice to turn the monitors on and off, however, turning them back on and displaying the signal is a bit tricky. | ||
====script to turn monitor on/off==== | ====script to turn monitor on/off==== | ||
| − | <nowiki>#!/bin/bash -e | + | <nowiki> |
| + | #!/bin/bash -e | ||
# /usr/local/sbin/raspi-monitor | # /usr/local/sbin/raspi-monitor | ||
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main</nowiki> | main</nowiki> | ||
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====Add to cron job==== | ====Add to cron job==== | ||
Add the following script as a cronjob file | Add the following script as a cronjob file | ||
Revision as of 11:15, 26 March 2015
Contents |
xset
Overview
xset allows you to control a few things, but the most common is the monitor states. You can manipulate, enable, or disable some features like:
- dpms energy star features
- monitor standby, suspend, off, or on
- screen blanking
- screen exposing
- activate/reset screen saver
- screen saver on/off
It should be noted that while this can blank the monitor, it does not tell the monitor to turn off it's backlight.
disable screen saver/blanking
a common issue with raspberry pis used in kiosk/monitor setups is the screen blanking/screen saver kicking in. You can disable them with the following commands:
~$xset s noblank ~$xset s noexpose ~$xset s off ~$xset dpms 0 0 0
check it by doing:
~$xset -q
Keyboard Control:
auto repeat: on key click percent: 0 LED mask: 00000000
XKB indicators:
00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off
03: Compose: off 04: Kana: off 05: Sleep: off
06: Suspend: off 07: Mute: off 08: Misc: off
09: Mail: off 10: Charging: off 11: Shift Lock: off
12: Group 2: off 13: Mouse Keys: off
auto repeat delay: 500 repeat rate: 33
auto repeating keys: 00ffffffdffffbbf
fadfffefffedffff
9fffffffffffffff
fff7ffffffffffff
bell percent: 0 bell pitch: 400 bell duration: 100
Pointer Control:
acceleration: 20/10 threshold: 10
Screen Saver:
prefer blanking: no allow exposures: no
timeout: 0 cycle: 600
Colors:
default colormap: 0x20 BlackPixel: 0x0 WhitePixel: 0xffff
Font Path:
/usr/share/fonts/X11/misc,/usr/share/fonts/X11/Type1,built-ins
DPMS (Energy Star):
Standby: 0 Suspend: 0 Off: 0
DPMS is Enabled
Monitor is On
Turn monitors on/off
You can use tvservice to turn the monitors on and off, however, turning them back on and displaying the signal is a bit tricky.
script to turn monitor on/off
#!/bin/bash -e
# /usr/local/sbin/raspi-monitor
# Script to enable and disable the HDMI signal of the Raspberry PI
# Inspiration: http://www.raspberrypi.org/forums/viewtopic.php?t=16472&p=176258
CMD="$1"
function on {
/opt/vc/bin/tvservice --preferred
# Hack to enable virtual terminal nr 7 again:
chvt 6
chvt 7
}
function off {
/opt/vc/bin/tvservice --off
}
function must_be_root {
if [ $USER != root ]; then
echo "ERROR: Script must be executed as the root user"
exit 1
fi
}
function main {
must_be_root
if [ "$CMD" == "on" ]; then
on
elif [ "$CMD" == "off" ]; then
off
else
echo "Usage: $0 <on|off>"
exit 1
fi
exit 0
}
main
Add to cron job
Add the following script as a cronjob file
~$ sudo nano /etc/cron.d/raspi-monitor-scheduler
# /etc/cron.d/raspi-monitor-scheduler # Enable the monitor every weekday morning at 7:00 0 7 * * 1,2,3,4,5 root /usr/local/sbin/raspi-monitor on > /dev/null 2>&1 # Disable the monitor every weekday evening at 19:30 30 19 * * 1,2,3,4,5 root /usr/local/sbin/raspi-monitor off > /dev/null 2>&1
Make it executable
~$ sudo chmod +x /etc/cron.d/raspi-monitor-scheduler
