Re: skype on current/5.x and maestro-2E sound

On Mon, May 16, 2005 at 10:50:39PM +0800, Ariff Abdullah wrote:
> On Sun, 15 May 2005 22:15:22 +0300
> Ion-Mihai Tetcu <itetcu_at_people.tecnik93.com> wrote:
> > On Sun, 15 May 2005 20:59:50 +0200
> > Pav Lucistnik <pav_at_FreeBSD.org> wrote:
> > 
> > > Ion-Mihai Tetcu pí¨e v ne 15. 05. 2005 v 21:51 +0300:
> > > > On Sun, 15 May 2005 20:35:40 +0200
> > > > Pav Lucistnik <pav_at_FreeBSD.org> wrote:
> > > > 
> > > > > Edwin L. Culp pí?e v ne 15. 05. 2005 v 12:14 -0500:
> > > > > > Quoting Divacky Roman <xdivac02_at_stud.fit.vutbr.cz>:
> > > > > > 
> > > > > > > On Sun, May 15, 2005 at 02:41:24AM -0700, Julian Elischer
> > > > > > > wrote:
> > > > > > >> cpghost_at_cordula.ws wrote:
> > > > > > >> >On Sat, May 14, 2005 at 06:51:48PM -0700, Julian
> > > > > > >Elischer wrote: > >
> > > > > > >> >>Has anyone run skype successfully on these versions (5
> > > > > > >or 6) of freeBSD? > >>I can run it successfully on 4.x but
> > > > > > >on my 5.x machine the audio is > >>completely
> > > > > > >> >>broken up. like someone is chopping the audio stream.
> > > > > > >> >
> > > > > > >> >
> > > > > > >> >I'm running Skype on 5.4 (via82c686). On an AMD Duron
> > > > > > >1200 MHz, the > >sound quality is all right; on an EPIA
> > > > > > >5000 Eden 500 MHz (also via82c686), > >the sound is totally
> > > > > > >chopped and it is impossible to follow. >
> > > > > > >> hmm so maybe its the fact that my machine is too slow..
> > > > > > >it's also 500MHz > my 1GHz 4.11 machine seems to run it
> > > > > > >fine.
> > > > > > >
> > > > > > > I have exactly the same problem (broken sound)
> > > > > > > pcm0: <VIA VT8237> at io 0xe800 irq 12 kld snd_via8233
> > > > > > > (5p/1r/0v channels duplex default)
> > > > > > 
> > > > > > I had this on all my AMD/Athlon boards with the via sound
> > > > > > chipset.  I  found a reference to the problem, no solution,
> > > > > > on one of the Skype  BB's.  I finally just disabled the
> > > > > > onboard sound and added cheap  available sound cards and
> > > > > > they all have worked great.  I've tried to  get the via
> > > > > > sound to work a couple of times after that, without success.
> > > > > 
> > > > > Same story, different solution. With Open Sound drivers from
> > > > > www.opensound.com Skype works correctly.
> > > > 
> > > > Is this with via8235/8237 on -STABLE ?
> > > 
> > > pcm0: <VIA VT8237> port 0xb400-0xb4ff irq 22 at device 17.5 on
> > > pci0 pcm0: <Avance Logic ALC850 AC97 Codec>
> > > 
> > > Both RELENG_5/i386 and RELENG_5/amd64 (different boards, same
> > > chip)
> > 
> > 
> > Yup, I got one of this.
> > 
> >
>  
> Can you guys with snd_via8233 driver try these patches?
> 
> http://staff.mybsd.org.my/skywizard/FreeBSD/sound/via8233.c.diff
> http://staff.mybsd.org.my/skywizard/FreeBSD/sound/vchan.c.diff
> 
> set your hw.snd.maxautovchans or hw.snd.pcm0.vchans appropriately, add
> hint.pcm.0.via_dxs_disabled="1" into your /boot/device.hints and
> possibly with option PREEMPTION in kernel.

I tried this patch and with:
sysctl hw.snd.maxautovchans=1
sysctl hw.snd.pcm0.vchans=1

it works! so vchans seems to be the culprit... also one has to disable
hint.pcm.0.via_dxs_disabled="1"

from my pov its an improvement! but why is vchans making such big regression?
shouldnt be via_dsx_disabled set on default on rev=0x78 (rev I use)?

thnx, what other info/help can I provide?

roman