Read the statement by Michael Teeuw here.
cronjob vcgencmd display_power
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Hi guys, i am having trouble getting the magicmirror to turn the screen on and off with cronjob. I have used them before and it used to work and works with other installations with root /usr/bin…>/dev/null 2>&1 command but does not work anymore. I have tried all these variations and none work. I have used system wide cron with sudo nano edit and the reboot actually works…
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this is on pi3 and i also tried modifying boot/config.txt file
Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d (changed to fkms)
max_framebuffers=2 -
@megagprime This is how I run mine. I have 2 scripts and I call these scripts from the cron and not the actual vcgencmd
And in the scripts I run the following:
This works perfectly for me. Give it a go and let’s see if that works. I run an RPI 3B.
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@mumblebaj ya even this didnt work, maybe i need to change my boot/config file back to kms
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@megagprime anybody have any ideas why this doesnt work and should i change my boot file?
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@megagprime
Did you ever figure this out? I’m having the same issue -
@Nneuland nope, still no dice. building a new mm now, will update
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@megagprime @Nneuland depending on the board firmware, the vcgencmd may or may not work
this was reported and worked thru in the fall.
see https://forum.magicmirror.builders/topic/17185/pir-sensor-problem-after-restart-raspi/20?_=1672509926391 -
@sdetweil hi there, i still dont see a fix or alternative workaround. The commands themselves work i just cant get it to work with cronjon :(
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@megagprime what user is cron executing them as?
what user do you use when testing?
cron is root by default unless u add another parm for the username
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@sdetweil i use sudo for cron and root vcgencmd display_power for the command.
no idea if i am doing this right but like i said, i used to work lol
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@sdetweil i use sudo for cron and have tried root and just the vcgencmd, neither work
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@megagprime I think vcgencmd needs a DISPLAY env variable
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@sdetweil yes i use vcgencmd DISPLAY_POWER 0 or 1, like i said those commands work just fine just not in cron
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