Power saving mode isn't work ob RPi 3A+ 🐛 [BUG]

[yarodin]

Power saving mode isn't work ob RPi 3A+ 🐛 [BUG]

[yarodin]

I have tested this build and now power saving mode is working correctly in all possible cases. Thanks a lot.

[dwhinham]

OLED model? Details of who built the HAT and where you got it from?

OLEDs do not have a backlight, so please clarify what exactly you are seeing. The expected behaviour for the supported OLEDs is for the screen to simply turn blank.

If it doesn't work with a certain screen manufacturer then you may just have to disable/ignore this feature.

[yarodin]

Yes, sorry, OLED do not have a backlight and expected behaviour for my OLED is the screen to turn blank.
I did some more investigations and find out that:

1. If after power on I starting cores without mt32-pi support or even do nothing, mt32-pi will never goes to power saving mode (OLED isn't turn blank)

2. If I at least one time starting core with mt32-pi support (ao486 in my case) and application wich using MIDI (DOS monkey island for example) then the mt32-pi behaviouring normally until power off - after each 300 seconds of inactivity goes to power saving mode (OLED turn blank)

I don't know details about my version of mt32-pi-hat. I got completed device from russian online marketplace:

[dwhinham]

Please test this build: https://github.com/dwhinham/mt32-pi/actions/runs/4790017818

I only found one bug with sleep mode, which was when a network connection or re-connection notification (e.g. WiFi) could cause the screen to display a message and then force it to stay turned on.

Otherwise, everything else related to power saving mode works correctly with my MiSTer on official hardware, on all the cores I tested.