Graham,
The only issue that I had after uninstalling Pulse Audio was in maintaining the ALSA level controls such that the settings held constant through restarts/reboots. With Pulse Audio, I could set the audio levels control(s) form the command line with alsamixer, then make those settings permanent with the alsactl store command. I can still invoke both commands with Pulse Audio removed, but the level settings no longer remain constant after a restart having issued the alsactl store command before the restart.
I know very little about Linux and am not sure how best to get around this issue.
Bill
From: op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Sunday, October 8, 2017 6:40 PM To: op25-dev@yahoogroups.com Subject: [op25-dev] Re: OP25 on Ubuntu 14.04
My streaming machines all have Pulse Audio disabled since it is an unnecessary extra layer of complication. I presume the reboot issues you are having relate to increasing the size of the kernel asound prealloc buffer? If so, I solved that problem by having a small script executed at startup as follows:
#!/bin/sh PCM_ID="/proc/asound/card0/pcm0p/sub0/prealloc" LOGFILE="/home/username/prealloc.status" BUFSIZE="1024"
if [ -f $LOGFILE ]; then rm $LOGFILE fi
# Adjust playback buffer if [ -f $PCM_ID ]; then echo "Success: $PCM_ID ($BUFSIZE)" > $LOGFILE echo $BUFSIZE > $PCM_ID else echo "Failure: $PCM_ID ($BUFSIZE)" > $LOGFILE fi
Obviously you are going to need to edit the LOGFILE destination, but I find it works pretty well when called from /etc/rc.local