Pi Zero 2 released

[retropieuser555]

Oct 29 15:50:11 lvl0: 	VolumeControl::init() - Failed to attach to default card!
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM default
Oct 29 15:50:13 lvl0: 	AudioManager Error - Unable to open SDL audio: ALSA: Couldn't open audio device: No such file or directory

So I've got it working, lr-mupenplus runs super fast right now but that's due to having no audio in the system.

Anyone got any ideas? It's not to do with pulseaudio is it? As I just checked that's not installed

[mitu]

@retropieuser555 You should open a separate topic.

[George Spiggott]

ETA Prime has already overclocked the Pi Zero 2 to 1.3Ghz.

[retropieuser555]

So here's my little test with the beta recalbox image

[dankcushions]

@george-spiggott
bit of a useless overclock for retropie, mind - core_freq and v3d_freq are far more beneficial to pi3 (and by extension pi zero 2) as bandwidth and gpu is the limitation, not cpu.

[ParadoxGBB]

Hey all,

Looking to maybe get one with a GPi Retroflag case, had a few questions for those willing to humor me (thanks in advance!):

1. About how much time do you get on a reasonable emulator, say NES, via the AAs? Anyone try rechargeables?

2. The case appears to not have an open port for HDMI out, but it looks like you could drill a hole up the top to do so and run the script to toggle between the displays. Has anyone tried this? Or suggest a different case?

3. Someone mentioned no HW video decoding on this board, has anyone attempted to run Kodi 8.7 (hopefully Matrix one of these days) on this through HDMI? Can you get 720p?

My dream device would be to have a handheld on a plane. It looks like this would be perfect because you could even power it with a USB bank if you needed to. And then, be able to check into a hotel room, plug this device into the TV's HDMI, and connect home via Plex, controlling it with my phone.

I have a Pi3 with a GameHat but while it can do the latter scenario OK, the handheld part is a bit too clunky for my preferences and it's not really that easy to travel with, although it was a fun experiment. This looks much better and not too underpowered.

Thanks again!

[mitu]

@paradoxgbb said in Pi Zero 2 released:

Someone mentioned no HW video decoding on this board, has anyone attempted to run Kodi 8.7 (hopefully Matrix one of these days) on this through HDMI? Can you get 720p?

That's not true. It's basically the Pi3B in a smaller package, even the Pi0 has HW video decoding (MPEG4).

[ParadoxGBB]

@mitu Apologies, didn't mean to spread misinformation! If that's the case Kodi should be ok based on my experiences on my Pi3B.

[jpwhiting]

@retropieuser555 with the following I get some sound, but it's very buzzy, i.e. it's not really routed through the gpi case somehow in /boot/config.txt:

# dtoverlay=pwm-audio-pi-zero^M

dtoverlay=hifiberry-dac

What does the recalbox beta image have in /boot/config.txt ? does audio work on that?

I found that here by the way: https://www.jeffgeerling.com/blog/2021/raspberry-pi-zero-2-powers-null-2-retropie-gaming-handheld

[mitu]

@jpwhiting see https://retropie.org.uk/forum/topic/31555/no-sound-retroflag-gpi-case-with-pi-zero-w-2-solved/ for using the new Zero with the GPICase.

[jpwhiting]

@mitu Thanks, that helped. Still getting some buzzing though during game play in all emulators I've tried so far. Sound effects come through ok, but music is very quiet and the buzzing overwhelms it.

[retropieuser555]

@jpwhiting his info about the display is interesting, as it'd be nice to find a solution to not being stuck on the legacy driver on the gpi case. As it was the only reason the original pi zero couldn't play the source port of mario 64 it played fine on a hdmi putput

[Unknown]

So happy to hear the zero got an upgrade. I have wanted to build a handheld for a long time, but the zero just wasn't quite enough power for it to be worth it. Until now!

[Brunnis]

Started experimenting with RetroPie on my Zero 2. Installed the latest weekly image (from Oct 29) and then used the RetroPie-Setup script to update it (including operating system packages). Everything seems to work fine, including audio.

By the way, there's no easy way of using FKMS or KMS video drivers with RetroPie on this hardware, right? It seems the old BRCM stack is still the default on pre-Pi 4 hardware and trying to use FKMS or KMS results in EmulationStation not starting (which isn't too surprising, of course).

[mitu]

@brunnis said in Pi Zero 2 released:

By the way, there's no easy way of using FKMS or KMS video drivers with RetroPie on this hardware, right?

You can do that, but you'll have to re-install from source every package, since we don't provide KMS enabled binaries. Of course, depending on the choice (fkms/kms driver), some packages will not be available (splashscreen, audio, emulators that depend on the BRCM stack, etc.). You might as well do that on a Pi3, since it has more RAM, and transfer back the image.

[Brunnis]

@mitu said in Pi Zero 2 released:

You can do that, but you'll have to re-install from source every package, since we don't provide KMS enabled binaries. Of course, depending on the choice (fkms/kms driver), some packages will not be available (splashscreen, audio, emulators that depend on the BRCM stack, etc.). You might as well do that on a Pi3, since it has more RAM, and transfer back the image.

Right, that was simple enough. Thanks! Just recompiled EmulationStation and it now starts up fine.

[thomasca]

@mitu I utilized the config.txt from that thread, but still can't get audio over the headphone jack or speaker to work yet. I'm still get a no sound device error when starting games.

[mitu]

@thomasca Not sure what topic you're referring to - may start a separate topic and add more info.

[Brunnis]

Got RetroArch working with KMS as well, by recompiling. Now, the more troublesome part will be to try to get the GPI Case display working under KMS. I don't know if anyone has done it. Found this recent thread on the Raspberry Pi forums, which offers some pointers, but no conclusion:

https://forums.raspberrypi.com/viewtopic.php?t=322556

If anyone knows of any more useful resources (or anyone that has done this before), I'd be grateful if you'd let me know.

[retropieuser555]

@brunnis yeah I couldn't understand it. It's clearly possible I just can't figure out how to recompile that device tree files without getting errors. The good though is if one person figures it out is the gpi case is uniform and we can all just use the same dts file