Solved: Screen not blanking while play

[SOLVED] Screen not blanking while play - Printable Version

+- Moode Forum (https://moodeaudio.org/forum)
+-- Forum: moOde audio player (https://moodeaudio.org/forum/forumdisplay.php?fid=3)
+--- Forum: Support (https://moodeaudio.org/forum/forumdisplay.php?fid=7)
+--- Thread: [SOLVED] Screen not blanking while play (/showthread.php?tid=7379)

Screen not blanking while play - felix1024 - 02-03-2025

Hi

It seems, that the option screensaver timeout is disabled while the player is running.
Only when not playing anything the display blanks.

Is it possible to change this behaviour by enable screensaver all the time?
Furthermore would it be possible to dim the display after some time? (instead of blanking it)

I am using a DSI display which has the possibility to adjust brightness.
(brightness adjust utility works on RaspiOS desktop so far)

-Felix

RE: Screen not blanking while play - Tim Curtis - 02-03-2025

Yes, when music starts playing the auto-screenblank is cancelled because in the general usage scenario its useful to be able to see whats playing, how much time is left, whats next in the Queue etc. Auto-dimming if it were possible would also need to be cancelled to satisfy this scenario.

Theres a brightness option in Peripheral Config for DSI displays. It should work as long as the display uses the same system parameter for brightness as does the Pi Touch 1 or 2.

RE: Screen not blanking while play - felix1024 - 02-04-2025

(02-03-2025, 07:23 PM)Tim Curtis Wrote: Yes, when music starts playing the auto-screenblank is cancelled because in the general usage scenario its useful to be able to see whats playing, how much time is left, whats next in the Queue etc. Auto-dimming if it were possible would also need to be cancelled to satisfy this scenario.

Theres a brightness option in Peripheral Config for DSI displays. It should work as long as the display uses the same system parameter for brightness as does the Pi Touch 1 or 2.

Well the brightness option does not work in my case with that Waveshare 7.9" display.

To solve my problem a handy script inserted in /etc/rc.local helped.

Code:
#!/bin/bash

#dim_display.sh - look play status and dim display after 60 Sec. to conserve local display

DELAY=60

TIMER=$DELAY

DIMMED=80

while sleep 1;

do

    # check if any input piped in

    if IFS= read -d '' -n1 -t 0.01; then

            # echo 'Not empty!'

               while IFS= read -r -t 0.01;

               do

            # echo "$REPLY"

            if [[ $REPLY == *"RawTouchBegin"* ]]; then

                         # echo "Touch Event"

                       # in any case reset timeout and max brightness

                   TIMER=$DELAY

                   echo 255 > /sys/class/backlight/10-0045/brightness

               fi

               done

       fi

    DIMSTATE=$(cat /sys/class/backlight/10-0045/brightness )

    STATUS=$(mpc status)

    if [[ $STATUS = *"playing"* ]];

    then

        # echo "is playing"

        if [[ $DIMSTATE -eq 255 ]];

        then

            # echo "not dimmed" 

            if [[ $TIMER -gt 0 ]];

            then

                # echo "decrement timer $TIMER"

                TIMER=$((TIMER-1))

            else

                # echo "dim display"

                echo $DIMMED > /sys/class/backlight/10-0045/brightness

            fi

        fi

    else

        # echo "not playing"

        if (( DIMSTATE < 255 ));

        then

            # echo "reset dimmed"

            TIMER=$DELAY

            echo 255 > /sys/class/backlight/10-0045/brightness

        fi

    fi

done

One needs to install xinput tool
$ sudo apt-get install xinput

In /etc/rc.local insert this command to the end before exit 0

Code:
# this handles display brightness

DISPLAY=:0.0 xinput --test-xi2 --root | /home/moode/dim_display.sh 2>&1 &

So when moode is playing the display dims after 60 seconds. Any touch event will return to max brightness
If moode is not playing then display blanks after time set in peripherial configuration. Again any touch event makes display visible.

This is a little bit clumpsy solution, but works perfectly for me.

Regards
Felix

RE: Screen not blanking while play - the_bertrum - 02-05-2025

Does the touch that restores brightness also register as control touch. By that I mean if you touch to restore brightness and that touch is also on the volume wheel, does the volume change, for example?

RE: Screen not blanking while play - felix1024 - 02-05-2025

(02-05-2025, 09:11 AM)the_bertrum Wrote: Does the touch that restores brightness also register as control touch. By that I mean if you touch to restore brightness and that touch is also on the volume wheel, does the volume change, for example?

Yes of course, because the xinput tool monitors any input event going to the x.org server. So the script reacts on all touch (exactly 'RawTouchBegin') events no matter where on the display they occur without interrupt the event itself.

RE: Screen not blanking while play - the_bertrum - 02-05-2025

(02-05-2025, 09:21 AM)felix1024 Wrote:
(02-05-2025, 09:11 AM)the_bertrum Wrote: Does the touch that restores brightness also register as control touch. By that I mean if you touch to restore brightness and that touch is also on the volume wheel, does the volume change, for example?

Yes of course, because the xinput tool monitors any input event going to the x.org server. So the script reacts on all touch (exactly 'RawTouchBegin') events no matter where on the display they occur without interrupt the event itself.

I thought it might. There was talk a while back about the desirability of a "wake up" touch that was independent of any "control" touch so I was speculating this might be a way into that.