Colecovision sound stutters

[BuZz]

It's quite likely it's an issue with SDL2.0.5 (SDL 2.0.5 has had heaps of problems on the rpi) - I am going to try and git bisect it, but this will take some time.

If I find the commit in SDL, I will revert it or backport any fix if there is one. If I can't (and the coolcv author cannot work around it), I may be forced to switch back to SDL2.0.4 again...

[BuZz]

I have found the commit that causes the issue (this references our git mirror, not the original repository)

commit f0a9a821497b8e9d3e2496a5c5ab844cdddc5e4c
Author: Sam Lantinga <slouken@libsdl.org>
Date:   Wed Oct 12 22:25:19 2016 -0700

    Work-around for a hang when USB devices are unplugged, contributed by James Zipperer

diff --git a/src/audio/alsa/SDL_alsa_audio.c b/src/audio/alsa/SDL_alsa_audio.c
index 3fdbd82..574d51b 100644
--- a/src/audio/alsa/SDL_alsa_audio.c
+++ b/src/audio/alsa/SDL_alsa_audio.c
@@ -314,9 +314,20 @@ ALSA_PlayDevice(_THIS)
     swizzle_alsa_channels(this, this->hidden->mixbuf, frames_left);
 
     while ( frames_left > 0 && SDL_AtomicGet(&this->enabled) ) {
-        /* !!! FIXME: This works, but needs more testing before going live */
-        /* ALSA_snd_pcm_wait(this->hidden->pcm_handle, -1); */
-        int status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
+        int status;
+
+        /* This wait is a work-around for a hang when USB devices are
+           unplugged.  Normally it should not result in any waiting,
+           but in the case of a USB unplug, it serves as a way to
+           join the playback thread after the timeout occurs */
+        status = ALSA_snd_pcm_wait(this->hidden->pcm_handle, 1000);
+        if (status == 0) {
+            /*fprintf(stderr, "ALSA timeout waiting for available buffer space\n");*/
+            SDL_OpenedAudioDeviceDisconnected(this);
+            return;
+        }
+
+        status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
                                          sample_buf, frames_left);
 
         if (status < 0) {

I will see if this has been changed in newer versions and either revert or update.

[BuZz]

Please can you update retropie-setup and update coolcv and let me know if that sorts it (I reverted the problematic commit in sdl2).

[BuZz]

Issue has been reported upstream to sdl here - https://bugzilla.libsdl.org/show_bug.cgi?id=3599

[barbudreadmon]

I'll try to fix fbalpha-libretro's colecovision inputs soon, that way you'll have an alternative to CoolCV.

[BuZz]

@barbudreadmon that would be great :) thanks.

[mediamogul]

@BuZz

Everything is back up to speed and performing beautifully. It really does amaze me that a problem like this can be zeroed in on among an ocean of possible causes and rectified. Also, I know it doesn't "just happen", so again I thank you for taking the time to do this.

@barbudreadmon

I'll try to fix fbalpha-libretro's colecovision inputs soon, that way you'll have an alternative to CoolCV.

That would be fantastic! Thank you.

[EVEGames]

@mediamogul , does that mean there is a new CoolCV binary to be had, with these fixes in place? What would be our best way to get it installed over the top of our existing CoolCV?
Thanks!

[mediamogul]

@EVEGames

There's no new binary, but BuZz fixed the root of the problem and it can be applied by using the 'Update from Binary' option for CoolCV in the RetroPie-Setup.

[dman2552]

Is anyone else here running a USB sound device with CoolCV? It seems as long as my rpi3 is configured for USB sound, my screen goes blank and becomes unresponsive to any connected keyboard/controllers when I try to play any CV game (even launching a game from command line). I have to SSH in to reboot. This happens with a fresh 4.1 install to the latest 4.1.18 update with sound fix. So far everything else I use RetroPie for is fine.

[raymate]

Sounds good, I updated from binary (think I did) and it didnt seem to change, I'm sure Im doing it wrong.

For the newbies out here may just give us a quick guide.

[BuZz]

@raymate you didn't update retropie-setup.

[mediamogul]

My bad. I forgot to reiterate that above.

[mediamogul]

@dman2552

my screen goes blank and becomes unresponsive to any connected keyboard/controllers when I try to play any CV game

I can't speak to the keyboard controls, but you might try adding the following to /opt/retropie/configs/all/runcommand-onstart.sh and see if it solves the screen issue. It was used to solve a similar issue in Kodi a while back and may work here.

if [ "$2" = "coolcv" ]
then
fbset -depth 8
fbset -depth 32
fi

[raymate]

OK did from script and it works, sound normal. Perfect thank to all your hard work

[dman2552]

@mediamogul said in Colecovision sound stutters:

@dman2552

my screen goes blank and becomes unresponsive to any connected keyboard/controllers when I try to play any CV game

I can't speak to the keyboard controls, but you might try adding the following to /opt/retropie/configs/all/runcommand-onstart.sh and see if it solves the screen issue. It was used to solve a similar issue in Kodi a while back and may work here.

if [ "$2" = "coolcv" ]
then
fbset -depth 8
fbset -depth 32
fi

I tried as you suggested but it didn't work. I did find out what the problem was. I used the /etc/modprobe.d/alsa-base.conf method of setting the sound device but had to use the /etc/asound.conf method. All seems to be working great now.

Thanks.

[edmaul69]

@BuZz i have an ip address showing but when i try to update setup script so i can update coolcv i am getting this error:

I even rebooted my pi and same thing. Tested in basilisk and i have internet connection.

[Rion]

@barbudreadmon said in Colecovision sound stutters:

I'll try to fix fbalpha-libretro's colecovision inputs soon, that way you'll have an alternative to CoolCV.

Yes please! 😀

[herb_fargus]

@barbudreadmon I also hear the bluemsx is capable of emulating colecovision ;) just needs some controller hooks.

[BuZz]

@edmaul69 unrelated to this btw - you have out of date certificates, incorrect system time, or they have been removed. sd card corruption could also cause issues like this.

if related to missing certs you can try

sudo apt-get install --reinstall ca-certificates

if still no luck start a new topic.