There are really only two main logs that you should be interested in:
1. `dmesg`: this will give you some clues if you've got faulty hardware (look for red error output)
2. `sudo journalctl -r`: Scroll down and check around and before the time(s) that the Pi becomes unresponsive for clues
That is a great help Bryan thank you.
There are red entries in both these files which I don't really understand as they refer to i2c which is not enabled, I have never used i2c so unsure of the significance of this. It also complains about "module-alsa-card" I can only wonder if this refers to the 'Player' output that might be used to play a file locally - this is set to 'null output' in the option.
I will reproduce the end section of code here that shows errors.
'dmesg'12.373803] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.374385] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.374913] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.382013] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.382374] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.382659] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.409147] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.409688] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.410202] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.416905] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.417202] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 12.417475] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.180990] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.181596] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.182164] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.189367] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.189660] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.190049] hdmi-audio-codec hdmi-audio-codec.3.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.218294] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.218900] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.219604] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.226413] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.226834] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.227165] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC:
error at snd_soc_dai_startup on i2s-hifi: -19[ 13.276087] bcmgenet fd580000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 13.276117] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 31.835895] cam-dummy-reg: disabling
[ 31.835907] vcc-sd: disabling
[ 31.835914] cam1-reg: disabling
[ 202.254947]
v3d fec00000.v3d: MMU error from client CLE (4) at 0x36a1000, pte invalid
and from `sudo journalctl -r` which reproduces the above errors plus:Mar 06 17:35:56 rpi x11vnc[722]:
Libgcrypt warning: missing initialization - please fix the applicationMar 06 17:35:48 rpi pulseaudio[588]:
Failed to load module "module-alsa-card" (argument: "device_id="2" name="platform-f>Mar 06 17:35:48 rpi pulseaudio[588]:
Failed to find a working profile.The above error are then displayed followed by:Mar 06 17:35:48 rpi pulseaudio[588]:
Failed to load module "module-alsa-card" (argument: "device_id="1" name="platform-f>Mar 06 17:35:48 rpi pulseaudio[588]:
Failed to find a working profile.The above error are then displayed followed by:Mar 06 17:35:48 rpi lightdm[613]:
Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus>Although I don't know the true significance of the above I would think it can't be good, so start again I think is the best idea. I have new SD cards and thumb drives that I can use and if I preserve the current ones I can then compare them.
Thanks again for your information, I would never have found those files.
Peter
[Correction - Sorry seems I can't read now, The log refers ti i2s not i2c]