From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932883AbWJGXCl (ORCPT ); Sat, 7 Oct 2006 19:02:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932884AbWJGXCl (ORCPT ); Sat, 7 Oct 2006 19:02:41 -0400 Received: from mail-in-02.arcor-online.net ([151.189.21.42]:12945 "EHLO mail-in-02.arcor-online.net") by vger.kernel.org with ESMTP id S932883AbWJGXCl (ORCPT ); Sat, 7 Oct 2006 19:02:41 -0400 From: Prakash Punnoor To: Adrian Bunk Subject: Re: 2.6.19-rc1: known regressions (v2) Date: Sun, 8 Oct 2006 01:02:33 +0200 User-Agent: KMail/1.9.4 Cc: Linus Torvalds , Linux Kernel Mailing List , alsa-devel@alsa-project.org References: <20061007214620.GB8810@stusta.de> In-Reply-To: <20061007214620.GB8810@stusta.de> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3582523.QVHlDXvm4u"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200610080102.37267.prakash@punnoor.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --nextPart3582523.QVHlDXvm4u Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Am Samstag 07 Oktober 2006 23:46 schrieb Adrian Bunk: > Subject : snd-hda-intel <-> forcedeth MSI problem > References : http://lkml.org/lkml/2006/10/5/40 > Submitter : Prakash Punnoor > Status : unknown AFAIK, strictly speaking this is not a regression, but rather a new feature= =20 breaking: MSI capability of snd-hda-intel. Alsa dev =20 Takashi Iwai doesn't think it is snd-hda-intel doing something wrong, but=20 rather an IRQ routing probem. As such I am not sure who to cc.... While I don't really understand the details, I guess it is due to snd and n= et=20 sharing the interrupt in "pure" APIC more: 23: 232796 0 IO-APIC-fasteoi HDA Intel, eth0 So both are physically on the same INT line? But MSI of snd want to assign= =20 another IRQ to itself: 23: 7486 0 IO-APIC-fasteoi eth0 316: 0 0 PCI-MSI-edge HDA Intel So it seems that irq23 still receives signals from snd and thus the nobody= =20 cared message gets printed. Thus my work-around is simply to disable MSI of snd by=20 snd-hda-intel.disable_msi=3D1 and all is well again. So if this cannot be fixed for 2.6.19, I humbly suggest deactivating MSI of= =20 snd-intel-hda by default. Cheers, =2D-=20 (=B0=3D =3D=B0) //\ Prakash Punnoor /\\ V_/ \_V --nextPart3582523.QVHlDXvm4u Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQBFKDINxU2n/+9+t5gRAtieAJ0Vw0Lf2L3Vwx8jfYjDbMsRAmtvjACg+T04 5TlyAD/uTPM9eXZ6BMwAY88= =iQT0 -----END PGP SIGNATURE----- --nextPart3582523.QVHlDXvm4u--