Date: Sun, 14 Jan 2001 13:17:02 -0500 (EST) From: Peter Dufault <dufault@hda.hda.com> To: current@freebsd.org Subject: Re: Fan speed control sony vaio lx800 slimtop Message-ID: <200101141817.f0EIH3F34298@hda.hda.com> In-Reply-To: <200101121305.f0CD5kx23941@hda.hda.com> from Peter Dufault at "Jan 12, 2001 08:04:31 am"
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I'm slightly hoping that enabling an AUTO HALT mode will turn the fan down. I don't think it will, I think I will have to do some subset of what "acpiconf -s 1" does in cpu_idle but will still respond to the next clock interrupt... So my two questions are: 1. Is there an obvious subset of S1 that would be an acceptable replacement for executing HLT and nothing happening in cpu_idle, and, 2. Does anyone understand "AUTO HALT", low power mode, etc on the Pentium III? I found programs (previous message has links) to enable power saving modes on Pentia, but they set a bit in "Model Specific Register 0x12: CTR0", and the Pentium III documentation says "code that accesses registers 11H, 12H, and 13H will generate exceptions on a P6 family processor". (IA-32 Software Developer's Manual, Volume 3: System Programming Guide, Intel order number 245472, page B-25) Peter (The system is reasonably quiet now with my additional sound proofing, but I'm afraid it isn't designed to continously run what was originally an unacceptably noisy fan). -- Peter Dufault (dufault@hda.com) Realtime development, Machine control, HD Associates, Inc. Fail-Safe systems, Agency approval To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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