Date: Sun, 29 Jun 2008 11:57:38 -0700 From: David Wolfskill <david@catwhisker.org> To: freebsd-acpi@freebsd.org Subject: Re: How/why would dev.cpu.0.freq_levels change??!? Message-ID: <20080629185738.GG13924@bunrab.catwhisker.org> In-Reply-To: <20080629003216.3AA074500E@ptavv.es.net> References: <200806281738.40672.jhb@freebsd.org> <20080629003216.3AA074500E@ptavv.es.net>
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--4ndw/alBWmZEhfcZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable OK; I've managed to demonstrate a few things: * Stopping powerd before the phenomenon occurs does not prevent dev.cpu.0.freq_levels from changing, though it does appear to prevent dev.cpu.0.freq from changing: g1-60(6.3-S)[1] sysctl dev.cpu.0.freq_levels dev.cpu.0.freq dev.cpu.0.freq_levels: 1200/0 1050/0 900/0 750/0 600/0 450/0 300/0 150/0 dev.cpu.0.freq: 2400 g1-60(6.3-S)[2]=20 * As you can see, this can lead to the "interesting" situation that the current CPU frequency is higher than the maximum "available." * The phenomenon is not limited to when I run RELENG_6; in an effort to avoid the continuous fan whine, I tried running RELENG_7 for a while, and encountered a recurrence rather quickly. :-( * I tried firing up the Dell diagnostics; they reported OK for each of the CPU & motherboard fans at high speed, but when the diags tried to switch to low speed, they reported that the fans only went down (from 10-11K RPM) to about 7K RPM instead of 5K RPM. (They reported that everything else was working "optimally." Since their serial port test is known to be inadequate -- it makes no attempt to actually use the serial port to send or receive data at all -- I don't know how much that assessment is actually worth.) I still don't know what the problems are, but it's apparent that something outside FreeBSD's control is misbehaving. Given that, I suppose it would be unreasonable to expect FreeBSD to compensate in an attempt to enforce rationality. :-( Which still leaves me wondering what type(s) of evasive actions make sense: I've become rather accustomed to using a laptop with a 1600x1200 screen, and finding another laptop similarly-equipped (but newer) at a reasoonable price that will run FreeBSD well appears to be somewhat of a challenge. I'm open to suggestions. Maybe I should just see if the local laptop repair place can fix it. :-( Peace, david --=20 David H. Wolfskill david@catwhisker.org I submit that "conspiracy" would be an appropriate collective noun for cats. See http://www.catwhisker.org/~david/publickey.gpg for my public key. --4ndw/alBWmZEhfcZ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iEYEARECAAYFAkhn2yAACgkQmprOCmdXAD3XLgCeOWHRghJTQbXBPc33IIExjb6i ODMAnjaISSBFwRWGO/fdx0pW6uATwhFP =Onnt -----END PGP SIGNATURE----- --4ndw/alBWmZEhfcZ--
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