From: "Lincoln Baxter, III" <lincolnbaxter@gmail.com>
To: linux-acpi@vger.kernel.org
Subject: Re: HP nc6400 v.03 or v.05 laptop ACPI fails after reboot, works again after booting windows
Date: Fri, 15 Dec 2006 17:35:37 -0500 [thread overview]
Message-ID: <45832339.3050307@gmail.com> (raw)
In-Reply-To: <1166191807.7459.16.camel@pcjc2lap>
Update:
Kernel 2.6.18-r4
I've done some more testing, and I've narrowed the problem down to the
"processor" cpu driver.
I disabled all power management features in the kernel, and compiled
ACPI as modules so that they would not be loaded until I wanted them to be.
APM is off.
CPU Frequency Scaling is off.
ACPI is compiled entirely as modules to be loaded by the user.
While running on the battery:
As soon as I "modprobe processor" the humming begins, and as soon as I
"rmmod processor" the humming stops.
While running on AC, if I "modprobe processor" there is no buzzing. I
can remove the AC adapter and the computer remains silent.
It seems to be something related to the way that the processor driver is
handling power to the CPU. Ideas?
next prev parent reply other threads:[~2006-12-15 22:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-12 23:14 HP nc6400 v.03 or v.05 laptop ACPI fails after reboot, works again after booting windows Lincoln Baxter, III
2006-12-12 23:42 ` Peter Clifton
2006-12-13 7:54 ` Lincoln Baxter, III
2006-12-13 12:25 ` Peter Clifton
2006-12-15 13:41 ` Lincoln Baxter, III
2006-12-15 14:10 ` Peter Clifton
2006-12-15 14:38 ` Lincoln Baxter, III
2006-12-15 22:35 ` Lincoln Baxter, III [this message]
2006-12-16 4:30 ` Pavel Troller
2006-12-16 7:59 ` Lincoln Baxter, III
2006-12-16 8:17 ` Frank Ursel
2006-12-17 18:51 ` Lincoln Baxter, III
2006-12-21 21:44 ` Lincoln Baxter, III
2006-12-21 22:40 ` Peter Clifton
2007-01-05 14:18 ` Thomas Renninger
2007-01-12 5:51 ` Luming Yu
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