Date: Wed, 23 May 2012 22:37:18 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Alexander Motin <mav@freebsd.org> Cc: multimedia@freebsd.org Subject: Re: NV10 hdac issue Message-ID: <20120523193718.GF2358@deviant.kiev.zoral.com.ua> In-Reply-To: <4FBD2D50.5080205@FreeBSD.org> References: <20120522220640.GB2358@deviant.kiev.zoral.com.ua> <4FBD2D50.5080205@FreeBSD.org>
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--+TV/ighyc7Vd8/th Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 23, 2012 at 09:32:48PM +0300, Alexander Motin wrote: > On 05/23/12 01:06, Konstantin Belousov wrote: > >I have (another) Atom motherboard from Intel, DN2800MT. Now, the problem > >is with distorted sound. Anything is played as if some pause is inserted > >after the next sample is finished. So I hear the proper pitch, but with > >guggle between fragments. I am not sure how to describe it better, except > >to say that it sounds as if buffering was not enough, for regular short > >intervals of approx. 0.5 sec. > > > >I do not believe that 1.8Hhz Atoms are too slow to decode mp3 or to play= =20 > >wav. > > > >The hda controller is > >hdac0@pci0:0:27:0: class=3D0x040300 card=3D0x20128086 chip=3D0x27d8= 8086=20 > >rev=3D0x02 hdr=3D0x00 > >codec is Realtek ALC888. The verbose dmesg from hda_snd load is at > >http://people.freebsd.org/~kib/tom.dmesg.txt , assuming this is useful. > > > >I would want to get normal sound from this board, thanks in advance. >=20 > I haven't seen alike reports neither for this controller, nor for this=20 > CODEC. I would try to experiment with: > 1) disabling MSI interrupts with hint.hdac.0.msi=3D0 > 2) switching to polling mode without using any interrupts with=20 > dev.hdac.0.polling=3D1 > 3) changing buffer size with hw.snd.latency > 4) changing playback format (or vchans format it it is used) > 5) setting sysctl hw.snd.verbose=3D2 and checking for application level= =20 > underruns with `cat /dev/sndstat`. Thank you, setting hw.snd.latency to 10 fixed the issue. Still, I do not understand why default settings for the driver are not enough for the machine. --+TV/ighyc7Vd8/th Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAk+9PG0ACgkQC3+MBN1Mb4jmfACgkHrSOL6aAQdcza3uIEZawFdf wD4AoIHqUMrHeovuboPCh7+I8HoMHBka =v0K5 -----END PGP SIGNATURE----- --+TV/ighyc7Vd8/th--
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