From owner-freebsd-current@FreeBSD.ORG Sat Feb 21 17:49:05 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F2279106566B; Sat, 21 Feb 2009 17:49:05 +0000 (UTC) (envelope-from minimarmot@gmail.com) Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.173]) by mx1.freebsd.org (Postfix) with ESMTP id BFB068FC0C; Sat, 21 Feb 2009 17:49:05 +0000 (UTC) (envelope-from minimarmot@gmail.com) Received: by wf-out-1314.google.com with SMTP id 27so1456200wfd.7 for ; Sat, 21 Feb 2009 09:49:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=V0lk4ZSvIbE1WSZaV5h0A1Pp/WDsmbb9CdWFz/fgR0Y=; b=YmYSCpgQ5keTioFSRJzr8AeoJkWHYSmWMnXJsYk93icPsi+qKq5BeY7myoDQFi2m2e gTKX9dThORCOajoY9QMwMG4MMygyWCUN09WinlBwW5s5ViNZXSJ27APQrBp7Mz2F1nwj VRISEwfTeFW9IrUSETc7M7GTnxmxhmMNUFQbs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=BAr36FrGzH6VHPFgl4pt3kKUdT/eXxrYoSyTsHeLUnAp+FLAoyMc9Pe93Pfz+cXtTG qASUyvRFROqmDFXY1i+0xFfOAOGFswqjg+iDvySeeQzoZIiBjNZfEhq8iU2j3SAi6WL0 ulCecV2s0f34K1ZY+BUBDgDWLufh7oOnR+L+k= MIME-Version: 1.0 Received: by 10.142.79.17 with SMTP id c17mr1047097wfb.171.1235238545236; Sat, 21 Feb 2009 09:49:05 -0800 (PST) In-Reply-To: <499FFC5F.3020903@FreeBSD.org> References: <1235218982.00077642.1235207402@10.7.7.3> <499FFC5F.3020903@FreeBSD.org> Date: Sat, 21 Feb 2009 12:49:05 -0500 Message-ID: <47d0403c0902210949i74473bc5j57c923e13c85e89@mail.gmail.com> From: Ben Kaduk To: Alexander Motin Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Garrett Cooper , FreeBSD Current Subject: Re: Annoying whitenoise sound coming from snd_hda enabled chipset X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Feb 2009 17:49:06 -0000 On Sat, Feb 21, 2009 at 8:06 AM, Alexander Motin wrote: > 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 hard to be sure, since I'm not sure that I could describe what I hear any better than Garret did, but I think I'm seeing the same sort of thing on my work desktop. I'll try setting unneeded volumes to zero the next time I'm in, and see if that helps. dmesg and pciconf are available here: http://stuff.mit.edu/afs/sipb.mit.edu/user/kaduk/freebsd/periphrasis/ -Ben Kaduk