From owner-freebsd-current@FreeBSD.ORG Tue Aug 4 17:46:28 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 6C23B106564A for ; Tue, 4 Aug 2009 17:46:28 +0000 (UTC) (envelope-from ota@j.email.ne.jp) Received: from mail2.asahi-net.or.jp (mail2.asahi-net.or.jp [202.224.39.198]) by mx1.freebsd.org (Postfix) with ESMTP id 370918FC14 for ; Tue, 4 Aug 2009 17:46:28 +0000 (UTC) (envelope-from ota@j.email.ne.jp) Received: from localhost (pool-70-20-219-14.phil.east.verizon.net [70.20.219.14]) by mail2.asahi-net.or.jp (Postfix) with ESMTP id 2B8C47C354; Wed, 5 Aug 2009 02:46:24 +0900 (JST) Date: Tue, 4 Aug 2009 13:46:15 -0400 From: Yoshihiro Ota To: Ben Kaduk Message-Id: <20090804134615.be30680f.ota@j.email.ne.jp> In-Reply-To: <47d0403c0907291606v3dd8857bo1fd9d49b10e2555f@mail.gmail.com> References: <7d6fde3d0902210101yfb42ff6yd0aa31e6f16b5761@mail.gmail.com> <558ffc2b0907231623v2bad80bbref035bd1fd950d39@mail.gmail.com> <20090728224331.4fc5ed50.ota@j.email.ne.jp> <47d0403c0907291606v3dd8857bo1fd9d49b10e2555f@mail.gmail.com> X-Mailer: Sylpheed 2.6.0 (GTK+ 2.12.11; i386-portbld-freebsd7.1) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Garrett Cooper , FreeBSD Current , =?UTF-8?B?U3TDpWxl?= 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: Tue, 04 Aug 2009 17:46:28 -0000 On Wed, 29 Jul 2009 19:06:27 -0400 Ben Kaduk wrote: > 2009/7/28 Yoshihiro Ota : > > On Fri, 24 Jul 2009 01:23:18 +0200 > > Ståle Lyngaas wrote: > > > >> On Sat, Feb 21, 2009 at 11:01 AM, 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 suspect this is due to the CPU executing the HLT instruction. > >> > >> Try running the following command: > >> sysctl machdep.cpu_idle_hlt=0 > >> > >> -- > >> Ståle 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 After machdep.idle, the sound went away here, too. The laptop just got hotter, however. It looks this sound only comes from one of two laptop I have. I probabry live with the sound as it is the mid. summer now. Thanks for your info, though. Hiro