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crobtab command running multiple times

TomH
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Hey so I recently did a Raspberry Pi project, hooking it up to the 7-inch touchscreen and I want it (the screen) to turn off at night and back on in the morning. After a bit of googling I went with the crontab

 

30 5 * * * xset -display :0.0 dpms force off

30 22 * * * xset -display :0.0 dpms force on

 

Which works to turn it off (and I assume on but I'm not actually awake at 5:30 am) at these times, however it also turns off (again and I assume on but that's harder to notice) multiple times, seemingly at random times, throughout the day. Am I missing something?

 

(I'm running Pi OS btw)

 

Thanks

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