From owner-freebsd-acpi@FreeBSD.ORG Sat Jun 25 15:47:17 2011 Return-Path: Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 548B51065675 for ; Sat, 25 Jun 2011 15:47:17 +0000 (UTC) (envelope-from vmagerya@gmail.com) Received: from mail-vw0-f54.google.com (mail-vw0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id E3E0C8FC1E for ; Sat, 25 Jun 2011 15:47:16 +0000 (UTC) Received: by vws18 with SMTP id 18so3644577vws.13 for ; Sat, 25 Jun 2011 08:47:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=7Z7H+rXt37X3q1WQjNUVncamevED7qGjLDGiKkH//HI=; b=pnxTUH99olL0kjDVJoa+SI+zgCuAdvLVP+d8umt1l/WMIX1VC5z1xsMdreX2Whhv/o d37Wlb54o9zhaYbcfiPzti94jK2kKflt1yv3PiSgKoVlt3rLF0NtGZSpZkmiWuAlQRrF 1wUhrv6SJ+d2xg6EpiBPW2C2vp3u/BJ8wAne8= 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; b=M2ef5FfflnEWSehUpJ9EbOGJVUQfKNggutFvbw8iJxadWK09PEsOQ/7kCI/6rwhgjX vVMRQo7ynLEfBp7WUqp4EzCUGhmva8KxVDwcdP9/yAECaU0TbgcrlcTplzkVaiROTimP cXK7qlsn7BZVRQxRszkUjg0F5CNHPECbjJN9M= MIME-Version: 1.0 Received: by 10.52.178.195 with SMTP id da3mr5844612vdc.179.1309016836078; Sat, 25 Jun 2011 08:47:16 -0700 (PDT) Received: by 10.52.184.226 with HTTP; Sat, 25 Jun 2011 08:47:15 -0700 (PDT) In-Reply-To: <4E05EB91.9090509@FreeBSD.org> References: <4E05EB91.9090509@FreeBSD.org> Date: Sat, 25 Jun 2011 18:47:15 +0300 Message-ID: From: Vitaly Magerya To: Andriy Gapon Content-Type: text/plain; charset=UTF-8 Cc: freebsd-acpi@freebsd.org Subject: Re: (Missing) power states of an Atom N455-based netbook X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Jun 2011 15:47:17 -0000 Andriy Gapon wrote: > on 24/06/2011 22:13 Vitaly Magerya said the following: >> Right after I start the laptop I only see one supported power state: >> >> # sysctl dev.cpu.0.cx_supported >> dev.cpu.0.cx_supported: C1/1 >> >> But after 4+ minutes of uptime more power states kick in: >> >> # sysctl dev.cpu.0.cx_supported >> dev.cpu.0.cx_supported: C1/1 C2/20 C3/100 >> >> I'd like to have all Cx right after the boot. Is this possible? >> >> (The temporary solution I employ is to update hw.acpi.cpu.cx_lowest >> every time devd gets ACPI CMBAT message; this appears to happen >> right after cx_supported is updated). > > Hmm, strange... > Can you check if FreeBSD thinks that the system is on AC power until that > CMBAT message? (I see in dmesg that during that boot it detected AC as > disconnected). AC was indeed disconnected during that boot (and hw.acpi.acline was 0 as expected). If I boot with power on the problem is the same: about 4 minutes there's only C1, after that there are C1 and C2 (C3 kicks in too once I disable the power). (I boot with power cord disconnected, since LCD brightness controls on the laptop don't work with FreeBSD, so that's the only way to turn the brightness down). >> Also, when I boot the same machine under Linux (latest Ubuntu), >> powertop reports C1, C2 and C4 right away. Is it possible to get >> C4 under FreeBSD as well? > > I believe that what FreeBSD reports as C3 is the same as what Linux reports > as C4. The problem is that on Linux power consumption is 5.2W (without USB suspension or any other things powertop suggests), while on FreeBSD I'm seeing 6.8W with C3. I assumed this was due to C4/C3 difference, but maybe Linux is doing something differently. >> Other ACPI problems, which I have are: >> 1. When the power cord is plugged in, C3 state disappears. > > Does the same happen with Linux? > Many notebooks disable deep Cx states when on AC power for some reason. No. On Linux C4 is reported both with and without AC plugged in. >> 2. When I plug (or unplug) the power cord I get these two messages: >> >> ACPI Error: [\\_SB_.VDRV] Namespace lookup failure, AE_NOT_FOUND >> (20101013/psargs-464) ACPI Error: Method parse/execution failed >> >> [\\_SB_.PCI0.LPC0.H_EC._Q51] (Node 0xc42ac1e0), AE_NOT_FOUND >> (20101013/psparse-633) >> >> (This appears to be harmless). > > Not sure about these, looks like some additional/external table is not > loaded. You may check if the same happens with the latest ACPICA in FreeBSD > CURRENT. I just tried it with CURRENT snapshot from 2011-05-12; it behaves the same. (For the record, Linux reports similar messages).