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(a)yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Sunday, October 8, 2017 6:40 PM To: op25-dev(a)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

No. I was not aware this was necessary before removing pulseaudio. I assume this command could be added to my op25 startup that get called from rc.local? One additional question. I have built your branch of op25 on Debian 8.9 and it compiles and works fine. The problem I have is that I can’t get rc.local in Debian 8.9 to run my startup yet the startup shell works if invoked manually from the local console (terminal) or remotely via ssh. I did verify that rc.local is executable, so I don’t know what’s up with that in Debian 8.9. Thank you! Bill From: op25-dev(a)yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Monday, October 9, 2017 7:11 PM To: op25-dev(a)yahoogroups.com Subject: RE: [op25-dev] Re: OP25 on Ubuntu 14.04 Are you calling "alsactl restore" after a reboot so that the stored parameters can be used to set the mixer levels? https://linux.die.net/man/1/alsactl

Graham, I believe that I have corrected the unstable audio level issue. In addition to sudo apt-get autoremove pulseaudio, I installed sudo apt-get install gnome-alsamixer, then issued gnome-alsamixer to set the level controls. This apparently caused a conflict with existing alsamixer and alsactl store files and functions? That said, having removed gnome-alsamixer has allowed Ubuntu’s alsactl store to set and maintain consistent audio levels that remain following restarts. Thank you for your help! Bill, WA8WG From: op25-dev(a)yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Tuesday, October 10, 2017 6:11 PM To: op25-dev(a)yahoogroups.com Subject: RE: [op25-dev] Re: OP25 on Ubuntu 14.04 Bill, I think you'll find that "alsactl store" saves the mixer parameters to a file (/var/lib/alsa/asound.state) and then you have to read them back in with "alsactl restore". I don't think it's automatic, so you'd want to add the command to one of the startup scripts. Unfortunately I can't help much with your rc.local problem. I'd expect google has the answer if you can figure out the correct question to ask it. Might be a path problem - something that wouldn't be an issue from an interactive shell, but no good at boot time. Graham