From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: 2.6.25 to 2.6.26-rc8 regression (related to ahci and acpi _GTF) Date: Wed, 02 Jul 2008 11:55:37 +0900 Message-ID: <486AEE29.2010506@gmail.com> References: <4869FB3C.4060509@crans.org> <200807011614.21491.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <200807011614.21491.rjw@sisk.pl> Sender: linux-acpi-owner@vger.kernel.org To: "Rafael J. Wysocki" Cc: linux-kernel@vger.kernel.org, =?ISO-8859-15?Q?Mathieu_B=E9rard?= , linux-ide@vger.kernel.org, ACPI Devel Maling List , Andrew Morton , Andi Kleen , Jeff Garzik List-Id: linux-ide@vger.kernel.org Rafael J. Wysocki wrote: > [Adding CCs.] >=20 > On Tuesday, 1 of July 2008, Mathieu B=E9rard wrote: >> Hi, >> I have a laptop with an ICH6M SATA Controller and a Hitachi hard dri= ve. >> While it worked well using the ahci module and Linux 2.6.25,=20 >> it get randomly 'stuck' for several seconds to several minutes with = 2.6.26-rc8. >> Successive errors progressively reduce the ATA link speed. >> >> Passing the libata.noacpi parameter is an effective workaround. >> >> Please note that it's not the first time i have this kind of issue, = see: >> http://marc.info/?l=3Dlinux-ide&m=3D117305595312399&w=3D2 >> This was found to be a bad interaction between my _GTF taskfile, whi= ch enable the >> "Enable Device-Initiated Interface Power State Transitions" feature,= and NCQ. >> The driver was later NCQ blacklisted to correct the problem. Can you please post the result of "hdparm -I /dev/sda" and full kernel boot log? 0xca is not a NCQ command so the it's not related to NCQ at all. It seems we'll need to filter out DIPM commands from _GTF. Thanks. --=20 tejun -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html