sticky sound on 7 stable
jhs at berklix.org
Fri Jan 11 06:43:30 PST 2008
I have sticky sound flow on 2 different slowish laptops running 7
Stable, Sound plays for a few secs, then breaks for a fraction &
resumes, repeatedly. I guess fault is not sound config, hence I'm
not posting multimedia@, but stable@ where I've seen other Sticky
7 response topics.
I have 3 test files:
-rwxr-xr-x 1 jhs staff 32521108 Dec 9 18:01 1.avi*
-rw-r----- 1 jhs staff 3859434 Dec 6 11:03 audio_01.mp3
-rw-r----- 1 jhs staff 42535964 Dec 6 11:02 audio_01.wav
1.avi: RIFF (little-endian) data, AVI, 320 x 240, ~15 fps, video: Motion JPEG, audio: uncompressed PCM (mono, 11024 Hz)
audio_01.mp3: MPEG ADTS, layer III, v1, 128 kBits, 44.1 kHz, JntStereo
audio_01.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz
1.avi is from my digital camera: a short movie.
(nothing wrong with 1.avi on a faster laptop running 6.2-REL)
mplayer plays it in bursts.
screen is local, no ethernet activity,
no other disc acrivity (makes etc)
Only other processe I have are idle sshd & apache & such,
nothing active. No disc activity until I start the
on a dir of / thus no soft updates
also on a dir of /usr with soft updates
mplayer *.wav (plays fine on a faster 6.2 box)
Plays normal speed on the slower CPU (where top shows 6 to
0% free). but occasional interruptions. ie sticky.
(no pcmcia ethernet activity, I can control it via SLIP!)
Plays slow on the faster CPU! (where top shows 10% free CPU)
(unusual machine, 5 pcmcia slots, maybe irqs or other conf. screwed,
thus pcmcia ethernet works.)
ksmp3play audio_01.mp3 (plays fine on a faster 6.2 box)
Really bad break up, this could be a different simpler problem ?
Maybe my CPU can't decompress fast enough ?
Maybe this not a FreeBSD problem ?
I think I tried swapoff on all partitions, & then building
a little ram disc for the mp3, no improvement.
Much other info on both laptops & their BSD conf. here:
host=lapd CPU 166M 586
host=lapn CPU 133M 586
Many dmesg & other debug info linked within, anything else you want
please just tell me debug command to run. I'm happy to try src/ &
sys/ patches etc. Pref. based on 7-stable.
Both have /boot/loader.conf:
hw.ata.ata_dma="0" # Essential else disk access fails.
Could that be it ?
both report from xs atacontrol mode ad0
current mode = PIO4
I dont know about HZ setting, or different schedulers, but happy
to try sysctls or tweak kernel configs if people suggest ideas ?
Should I be using rtprio or that SCHED/ULE whatever swapper ?
At least the same model Digital laptop
has played sound for others on older FreeBSD.
Ideas, comments, & TYFM URLs all welcome, Thanks !
Julian Stacey. Munich Consultant: BSD Linux Unix. http://berklix.com
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