Motion Detector

DirkS

So here i found a workaround. Maybe it fixes the issue but let’s see. I just modified my test script and need to see it the next hrs/days

https://github.com/raspberrypi/documentation/pull/245/files

https://github.com/raspberrypi/linux/issues/487

DirkS

Hi,

for all the people here I wrote it more cleary :D

i had big problems by switching off my screen with the PIR or another module with camera. The problem was not the module itself it is a firmware problem of the PI. I could see the same problem outside of MagicMirror as well by trying different things.

Reported also here:
https://github.com/raspberrypi/linux/issues/487

The symptom is that after a while of switching on and off the screen it remains off.

Dmesg reports the problem:

Nov  1 08:22:00 MagicMirror kernel: [86411.138649] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.138665] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.138670] detected fb_set_par error, error code: -22
Nov  1 08:22:00 MagicMirror kernel: [86411.139138] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.139148] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.139152] detected fb_set_par error, error code: -22
Nov  1 08:22:00 MagicMirror kernel: [86411.140642] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.140654] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.140659] detected fb_set_par error, error code: -22
Nov  1 08:22:00 MagicMirror kernel: [86411.140777] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.140785] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.140789] detected fb_set_par error, error code: -22
Nov  1 08:22:00 MagicMirror kernel: [86411.140856] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.140863] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.140868] bcm2708_fb_pan_display(0,0) returns=-22
Nov  1 08:22:00 MagicMirror systemd[1]: Started Getty on tty6.
Nov  1 08:22:00 MagicMirror kernel: [86411.256398] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.256413] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.256418] detected fb_set_par error, error code: -22
Nov  1 08:22:00 MagicMirror kernel: [86411.256758] raspberrypi-firmware soc:firmware: Request 0x00048003 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.256770] bcm2708_fb soc:fb: Failed to allocate GPU framebuffer (-22)
Nov  1 08:22:00 MagicMirror kernel: [86411.256775] bcm2708_fb_pan_display(0,0) returns=-22
Nov  1 08:22:00 MagicMirror kernel: [86411.296428] raspberrypi-firmware soc:firmware: Request 0x00040002 returned status 0x80000001
Nov  1 08:22:00 MagicMirror kernel: [86411.296455] bcm2708_fb soc:fb: bcm2708_fb_blank(0) failed: -22

Switching off the screen with

/opt/vc/bin/tvservice -o

and on with

/opt/vc/bin/tvservice --preferred && sudo chvt 6 && sudo chat 7

does not work reliable! The git issue tells you more about.

The workaround is a not yet described solution inside the config.txt

https://github.com/raspberrypi/documentation/pull/245/files

the option “hdmi_blanking=1” is your friend in this case! :D

Now i’m switching off the screen with

vcgencmd display_power 0

and on with

vcgencmd display_power 1

And it is working now like a charm! Did started to use it one day before this report and it is still working without any issue :)

Honestly speaking i don’t use any MM module for switching off anymore. But maybe my discovered solution will help any other and might be a way to change the module as well.

If you have trouble with on/off as well please check the output of dmesg. If you have the frambuffer problem you can fix it.

My personal solution is to have the PIR state at FHEM and from FHEM i’m using a script to switch the screen. But that’s a special case and for the most people here the usage of a MM Module will be the better way.

regards
Dirk

bibi

@DirkS thx for sharing! one question please : where is located the option : “hdmi_blanking=1” ???

bhepler

@bibi Based on that pull request, it looks like it’s in the config.txt of your Pi. So /boot/config.txt

DirkS

@bibi yes you need to include it into /boot/config.txt

bibi

@Dirks Thx!
@bhepler Thx! i will add this option there under HDMI hotplug as i don’t know where else to add.

bibi

@bhepler and @DirkS : any idea why my screen doesn’t stay off as long as no motion is detected??

done

@DirkS Thank you. Pi doesn’t die over nights :D

But before I mess it up:
Would the motion detection with the common script work or not?
How did you realize it? Where did you enter your new script?

And don’t you want to make an additional motion detector module for those who have the same problem? :)
I don’t see the original programmer caring to much. ;)

cheers
done

DirkS

@done as discribed above by @cpramhofer (thanks to you :) ) i created the monitor_on and off.sh script.
With FHEM i’m polling the PIR status and use a DOIF to call on or off. Because my homeautomation depends in FHEM i have much more control instead of using a MM module, i switch much more devices with the PIR as well. I have several Pi’s with FHEM installed so it is also on the PI for the Mirror.

DirkS

@bib you are providing a bit less information to give you some tipp.