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| #!/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: $0 <on|off>" | |
| exit 1 | |
| fi | |
| exit 0 | |
| } | |
| main |
| # /etc/cron.d/raspi-monitor-scheduler | |
| # Enable the monitor every weekday morning at 8:00 | |
| 0 8 * * 1,2,3,4,5 root /usr/local/sbin/raspi-monitor on > /dev/null 2>&1 | |
| # Disable the monitor every weekday evening at 17:30 | |
| 30 17 * * 1,2,3,4,5 root /usr/local/sbin/raspi-monitor off > /dev/null 2>&1 |
Is there any way of forcing the HDMI to only display a Framebuffer from a certain virtual console and block the Raspberry from switching automatically to the virtual console 1 when something is typed in the keyboard?
Sinrig's solution works fine, with a couple of minuses.
- the xscreensave-command subprocess doesn't stop when I log out, so neither does the script.
- it consumes 100% CPU on one core, per instance running (i.e. one per time you logged off and back on).
I included a line 'time.sleep(0.5)' in the loop (and ' import time' near the top) to prevent 2, but haven't found a solution for 1 yet. Not that it happens a lot that I log off, usually power down or reboot.
--Edit
I have to take my words back on 1, it stopped now. Earlier today I found I had 3 copies running at 100% CPU and a thermometer warning icon at the right hand top of my desktop after logging off and back on a couple of times, can't explain why.
sudo vcgencmd display_power 0
Unfortunately, this no longer works on the Raspberry Pi 4.
now works again
Hi,
in order to have the monitor output only shown, when there is no holiday, I added this 2 sections:
at line 7
###############################################
TODAY=$(date +%Y-%m-%d)
###############################################
after line 30,
###############################################
if grep -q $TODAY /home/pi/holidays.txt; then
echo Skipping holiday for $*
echo "Today $TODAY is a holiday!" >> /home/pi/today-is-a-holiday.txt
off
exit 0
fi
###############################################
Created a file: /home/pi/holidays.txt with a holiday on each line, e.g.
2021-11-01
Apparently, this is the better way to turn off and turn on the display power now:
This is reflected in @sinrig's post but it's hard to spot.