I have been chasing a problem with the audio crashing after 24 hours of continuous operation in Ubuntu 14.04 that appeared to have been caused by pulseaudio.    However, that was apparently not the cause as the audio server still crashes after 24 hours even with pulseaudio removed from the system.   

This is the response that scrolls when performing a speaker-test once the audio server crashes.

op25@op25-VirtualBox:~$ sudo speaker-test -t sine -f 500 -c2

[sudo] password for op25:

speaker-test 1.0.27.2

Playback device is default

Stream parameters are 48000Hz, S16_LE, 2 channels

Sine wave rate is 500.0000Hz

Rate set to 48000Hz (requested 48000Hz)

Buffer size range from 2048 to 16384

Period size range from 1024 to 1024

Using max buffer size 16384

Periods = 4

was set period_size = 1024

was set buffer_size = 16384

0 - Front Left

1 - Front Right

Time per period = 0.162188

0 - Front Left

1 - Front Right

Time per period = 0.172795

0 - Front Left

1 - Front Right

Time per period = 0.171719

0 - Front Left

1 - Front Right

Time per period = 0.170190

0 - Front Left

1 - Front Right

Time per period = 0.168764

0 - Front Left

1 - Front Right

Time per period = 0.176896

0 - Front Left

1 - Front Right

Time per period = 0.172278

0 - Front Left

1 - Front Right

Time per period = 0.172175

0 - Front Left

1 - Front Right

Time per period = 0.171800

0 - Front Left

1 - Front Right

Time per period = 0.172193

0 - Front Left

1 - Front Right

Time per period = 0.170080

0 - Front Left

1 - Front Right

Time per period = 0.173308

0 - Front Left

1 - Front Right

Time per period = 0.172197

0 - Front Left

1 - Front Right

Time per period = 0.172493

0 - Front Left

1 - Front Right

Time per period = 0.172013

0 - Front Left

1 - Front Right

Time per period = 0.171716

0 - Front Left

1 - Front Right

Time per period = 0.172795

0 - Front Left

1 - Front Right

Time per period = 0.176432

0 - Front Left

1 - Front Right

Time per period = 0.172236

0 - Front Left

1 - Front Right

Time per period = 0.172164

0 - Front Left

1 - Front Right

Time per period = 0.172311

0 - Front Left

1 - Front Right

Time per period = 0.171918

0 - Front Left

1 - Front Right

Time per period = 0.169485

0 - Front Left

1 - Front Right

Time per period = 0.169537

0 - Front Left

1 - Front Right

Time per period = 0.176434

0 - Front Left

1 - Front Right

Time per period = 0.172278

0 - Front Left

1 - Front Right

Time per period = 0.168199

0 - Front Left

1 - Front Right

^CWrite error: -4,Interrupted system call              (Control-C entered here to interrupt speaker-test.)

xrun_recovery failed: -4,Interrupted system call

Transfer failed: Interrupted system call

op25@op25-VirtualBox:~$

Has anyone seen this behavior while running op25 on Ubuntu?   Could there be a cron task that executes every 24 hours causing loss of the audio server??

Thank you,

Bill, WA8WG