Date: Tue, 24 Jul 2012 13:26:01 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Dan Allen <danallen46@airwired.net> Cc: List FreeBSD-STABLE Mailing <freebsd-stable@freebsd.org> Subject: Re: local APIC error 0x40 Message-ID: <20120724102601.GU2676@deviant.kiev.zoral.com.ua> In-Reply-To: <0974E59F-62DA-407A-99A7-6704A70D12C6@airwired.net> References: <0974E59F-62DA-407A-99A7-6704A70D12C6@airwired.net>
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--9hubxwIw+SFjuBUN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jul 23, 2012 at 03:49:37PM -0600, Dan Allen wrote: > Running FreeBSD 8.3 -- and updating sources on a daily base and building = everything -- I found a new APIC/ACPI problem introduced in the past week. >=20 > I have a Toshiba Satellite U205 with an Intel Core Duo (not a Core 2). I= t used to work fine with both cores but then sometime in on the road to BSD= 8.0 the machine began hanging. So I added to /boot/loader.conf >=20 > hint.apic.0.disabled=3D"1" >=20 > and the machine only had one core but it went back to being reliable. >=20 > The laptop sits idle a lot, so I also have in /etc/rc.conf >=20 > performance_cx_lowest=3D"LOW" >=20 > and the fans stay off unless I am doing a build. Everything was good. >=20 > I went away on a trip last week for five days, came home, did a csup to R= ELENG_8 and rebuilt the world, as usual, and now the fans are always runnin= g full! >=20 > If I comment out hint.apic.0.disabled=3D"1" from /boot/loader.conf and re= boot, the results are a mixed bag: >=20 > 1) I get my 2nd core back, and it no longer hangs! Hurray. > 2) The fans go back to usually being off and silent. Hurray! > 3) I get zillions of error messages streaming saying: >=20 > CPU0: local APIC error 0x40 > CPU1: local APIC error 0x40 >=20 > No good! >=20 >=20 > I am sitting at a prompt, no X-Windows, no apps running (other than the u= sual demons), and every few seconds I get another pair of these error messa= ges. >=20 > 4) The error appears benign other than flooding the console. Everything = works, nothing hangs, I can build the OS and everything appears fine. >=20 > So how do I get rid of these messages? What does error 0x40 mean? Does your system slows down with these messages ? 0x40 means that some code tried to send IPI with interrupt number from the range of assigned CPU faults. I believe that FreeBSD code never does that. Is there a BIOS upgrade for your machine ? --9hubxwIw+SFjuBUN Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAlAOeDkACgkQC3+MBN1Mb4hS9gCfZymwlbYL5bvjLMXzP4n9HZXL DLMAmwQuXExVBs/3f0hNe8UmdMHv2YxG =hAtn -----END PGP SIGNATURE----- --9hubxwIw+SFjuBUN--
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