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  • Global Moderator

    @luisito retropie defaults to 640x480 for libretro emulators on pi 0/1, so resolution should not be an issue. also, the physical size of the screen is not a factor, since you can typically run low resolutions on large displays no problem.


  • @Efriim I have changed all the setting with the exception of runcommand because I can't figure out where it is (I tried the runcommand option from RetroPie but it doesn't show as option in the submenus).

    With your proposed changes now I have managed to reach steady 32.7 FP, with the casual drop to 30 FPS.
    However, the main RetroPie menu sometimes drop to 12 FPS.
    If I access RetroArch within the game it pumps it to 60 FPS, but that is because the emulation gets paused.
    Zero still hoovers at a steady 42C at max temperature and 37C when idle.

    It definitely help by a lot, so thanks!! :D
    Still looks funny and feels slow but now it is playable.

    However, I still don't understand why the FPS are so low. A lot of people manage 60 FPS without a sweat with GBA games.

    And now, I am not sure what I did, changed or broke, but it seems that Hotkey (Select) + Right Shoulder, doesn't save state anymore.


  • @dankcushions said in Pi Zero Lagging with GBA emulation:

    for libretro emulators on pi 0/1, so resolution should not be an issue. also, the physical size of the screen is not a factor, since you can typically run low resolutions on large displays no problem.

    Thanks! I was under the impression that the GPU would have to squish more out for larger screens to achieve the desired scale.

  • Global Moderator

    @luisito i think it sounds to me like you've changed some settings in your tweaking, or perhaps weren't running from stock retropie in the first place. i would personally start from a fresh retropie standard image, no overclocking, and then see what it's like from there. once you've changed settings it's almost impossible to diagnose


  • @dankcushions Sure, I will do that.
    There is a new image right?
    I will report after doing all that. Perhaps during the weekend if time allows 😁


  • @luisito
    Or you could upload your settings and I can run a diff on them to highlight all the changes.
    Or delete the settings which should give you a new one, provided the overrides are also deleted.
    network~\configs\all\retroarch.cfg
    /opt/retropie/configs/all/retroarch.cfg

    Were you able to try htop from ssh commandline?

    upload large text files to pastebin.com
    I will edit the post above about runcommand.

    Since you got positive results if it wasn't just a fluke, you could try disabling a few more things
    settings >> drivers >> audio = alsathread
    settings >> video >> vertical sync = off
    settings >> video >> frame delay = 0 (alternative to turning the vsync off, maybe try a quick compare of value 7 and 15 just to see, then turn off vsync)
    settings >> latency >> run-ahead = off

    and
    settings >> user interface >> threaded tasks = off (Haven't had to use this before.)
    settings >> user interface >> appearance >> icon shadows = off

  • Global Moderator

    @Efriim said in Pi Zero Lagging with GBA emulation:

    Or delete the settings which should give you a new one, provided the overrides are also deleted

    no, this will give you retroarch defaults which are not retropie defaults, and will give you a whole new set of problems.

    i really wouldn't recommend changing any of the settings you are recommending. retropie will default to the right settings for all of these.


  • Thanks a lot! everybody. Things are improving so I think we are on the right track and your help is moving things forward.
    Have a lot of responsibilities for the next 4 days.So I will post again next week.

    But for the meantime I ran a very quick thop and hop, and the system is 97%m idle, nothing in the background eating power. Even the ram sits at 10% of maximum.


  • @dankcushions said in Pi Zero Lagging with GBA emulation:

    no, this will give you retroarch defaults which are not retropie defaults, and will give you a whole new set of problems.

    I was unaware of this. This is a revelation.


  • Try gpsp's non-retroarch version. With this version, you'll probably have less lag on GBA games, since it consumes less resources than the default retroarch version.

    I've tested this version on a Raspberry Pi 1 B+, and I remember playing some GBA games without lag. It was on 2015, and back then, if my memory serves, there was no lr-gpsp yet.

    I don't know if it'll work on your Pi Zero, but assuming Pi Zero and Pi 1 has approximately the same hardware, there's the chance that it can work.

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