sticky sound on 7 stable
rsmith at xs4all.nl
Fri Jan 11 08:53:19 PST 2008
On Fri, Jan 11, 2008 at 03:44:36PM +0100, Julian Stacey wrote:
> Hi stable@
> 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.
> 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
This won't help. Mayby there is a BIOS setting that would enable you to
run with dma enabled.
> I dont know about HZ setting, or different schedulers, but happy
On 7.x, it is recommended to use SCHED_ULE. I'm not sure what compiling
the kernel with HZ=1000 would accomplish, the default is HZ=100. See
Have a look at the sound(4) manual page. There are some sysctls that
influence latency; hw.snd.latency_profile and hw.snd.latency. If the
problem is IRQ processing, you could try setting dev.pcm.0.polling to 1
if the driver supports it. Another thing to check is if the sound card
isn't sharing an interrupt with other devices. The command 'ps -xa |
grep irq' would be of use there.
[plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated]
pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20080111/4b5930e9/attachment.pgp
More information about the freebsd-stable