Date: Sat, 21 Feb 2009 15:06:39 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Garrett Cooper <yanefbsd@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Annoying whitenoise sound coming from snd_hda enabled chipset Message-ID: <499FFC5F.3020903@FreeBSD.org> In-Reply-To: <1235218982.00077642.1235207402@10.7.7.3> References: <1235218982.00077642.1235207402@10.7.7.3>
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Garrett Cooper wrote: > I don't know how else to describe it, but when I turn up my > speakers enough (50%+) and don't have any sound playing, I hear a > whitenoise hiss coming out of them. When I change webpages (nvidia > driver is GIANT locked) or do something else kernel intensive it stops > for a brief second, but apart from that it's an annoying trill sound > almost like a mosquito humming around me waiting to be swatted. I think it may be radio interference with disconnected microphone inputs. Try to set all unneeded mixer volumes to 0, especially mic, monitor, speaker and mix. Inputs often have too sensitive 20-30dB pre-amplifiers. Some codecs have them on all inputs. > It's really driving me insane... Hopefully helpful snippets follow: > > vendor = 'Intel Corporation' > device = '82801IB/IR/IH (ICH9 Family) HD Audio Controller' > class = multimedia > subclass = HDA > pcib2@pci0:0:28:0: class=0x060400 card=0x82771043 chip=0x29408086 rev=0x02 > hdr=0x01 > > [gcooper@orangebox /usr/home/gcooper]$ uname -a > FreeBSD orangebox.gateway.2wire.net 8.0-CURRENT FreeBSD 8.0-CURRENT > #1: Mon Feb 16 20:50:56 PST 2009 > root@orangebox.gateway.2wire.net:/usr/obj/usr/src/sys/ORANGEBOX i386 Infromation about codec or even complete verbose dmesg would be more helpful. -- Alexander Motin
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