From owner-freebsd-current@FreeBSD.ORG Wed Jul 29 23:26:31 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 497A410656CC for ; Wed, 29 Jul 2009 23:26:31 +0000 (UTC) (envelope-from minimarmot@gmail.com) Received: from mail-ew0-f206.google.com (mail-ew0-f206.google.com [209.85.219.206]) by mx1.freebsd.org (Postfix) with ESMTP id A44258FC1B for ; Wed, 29 Jul 2009 23:26:30 +0000 (UTC) (envelope-from minimarmot@gmail.com) Received: by ewy2 with SMTP id 2so349293ewy.43 for ; Wed, 29 Jul 2009 16:26:29 -0700 (PDT) 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=GJgTq3RbZYBxlH+fzL0F539C0duN5/dlvPfaRvjKh/Q=; b=P0yVsgrlifgvzEtkuDW3hauQ6v6Z3H1BQpVqKKaFfW9Bz/9YGLrUnw8d7sdKmeKlrz vu2lNJEzFZP9YoRQiV7rjYJUfuCC47ss2HavU+xjsnb8TyMppxMDs60zTYgL/n7e2Ekd aiuEaS+eIrKhx4Q5kzDHYjZdHXJ7SCTN1PmzA= 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=FD6fuFTydCCWvM4S1XOs8A74HBWqpHI+syTpe0j6Max5wcfKENOWR6EFLSQg0wjTFf OWeN7gi2NdCf+TvpSwKqssRIL5pyug3+5LCIFcaIkVABll+jdp3xaYfYcAZYwDdXZ8Lx 9kzLD3vvhe3H7P0DjDLRJfgpwIqB2Al+/kCGA= MIME-Version: 1.0 Received: by 10.210.86.1 with SMTP id j1mr487666ebb.27.1248908788026; Wed, 29 Jul 2009 16:06:28 -0700 (PDT) In-Reply-To: <20090728224331.4fc5ed50.ota@j.email.ne.jp> References: <7d6fde3d0902210101yfb42ff6yd0aa31e6f16b5761@mail.gmail.com> <558ffc2b0907231623v2bad80bbref035bd1fd950d39@mail.gmail.com> <20090728224331.4fc5ed50.ota@j.email.ne.jp> Date: Wed, 29 Jul 2009 19:06:27 -0400 Message-ID: <47d0403c0907291606v3dd8857bo1fd9d49b10e2555f@mail.gmail.com> From: Ben Kaduk To: Yoshihiro Ota Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Garrett Cooper , FreeBSD Current , =?ISO-8859-1?Q?St=E5le_Lyngaas?= 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: Wed, 29 Jul 2009 23:26:32 -0000 2009/7/28 Yoshihiro Ota : > On Fri, 24 Jul 2009 01:23:18 +0200 > St=E5le Lyngaas wrote: > >> On Sat, Feb 21, 2009 at 11:01 AM, Garrett Cooper wro= te: >> > 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 suspect this is due to the CPU executing the HLT instruction. >> >> Try running the following command: >> sysctl machdep.cpu_idle_hlt=3D0 >> >> -- >> St=E5le Lyngaas > > I couldn't find such a sysctl. > The close one was machdep.cpu_hlt. Setting machdep.idle from acpi to spin make my problems go away. (None of the other options (mwait, mwait_hlt, hlt, acpi) helped.) -Ben Kaduk