Date: Mon, 9 Jun 2008 08:53:08 -0400 From: "Bob McConnell" <rvm@CBORD.com> To: "Jason Morgan" <jwm-freebsd-questions@sentinelchicken.net>, <freebsd-questions@freebsd.org> Subject: RE: Whine when EHCI controller enabled in BIOS Message-ID: <FF8482A96323694490C194BABEAC24A002D7B5BF@Email.cbord.com> In-Reply-To: <20080609041515.GB61635@sentinelchicken.net> References: <7039ada60806082040s36afc2c8n4698402ac5d4ff29@mail.gmail.com> <20080609041515.GB61635@sentinelchicken.net>
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On Behalf Of Jason Morgan > On Sun, Jun 08, 2008 at 09:40:17PM -0600, James wrote: >> I have a high pitched whine coming from my motherboard when the EHCI >> USB 2.0 controller is enabled in the BIOS. The whine only starts once >> FreeBSD 7.0-RELEASE is halfway through booting. >>=20 >> The whine also goes away when I plugin a USB drive in with EHCI >> controller enabled (usb keyboard and mouse being already plugged in). >>=20 >> Is this a hardware problem, or could it possibly be software related??? >=20 > I can't imagine this is a software issue. Sounds strange. Have you > tried to see if it isn't a fan issue? We have some Dell GX280s with a > bad batch of motherboards at my university---under specific conditions > (e.g., using certain video cards) the system fan will spin up 'til the > system sounds like it's about to take off. One of the device probes during startup could be sending what appears to be a full speed command to the fan controller. Bob McConnell
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