Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261301AbVDDRe5 (ORCPT ); Mon, 4 Apr 2005 13:34:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261302AbVDDRe5 (ORCPT ); Mon, 4 Apr 2005 13:34:57 -0400 Received: from mailout.stusta.mhn.de ([141.84.69.5]:12804 "HELO mailout.stusta.mhn.de") by vger.kernel.org with SMTP id S261301AbVDDRez (ORCPT ); Mon, 4 Apr 2005 13:34:55 -0400 Date: Mon, 4 Apr 2005 19:34:53 +0200 From: Adrian Bunk To: Daniel Drake , perex@suse.cz Cc: David Ford , linux-kernel mailing list , alsa-devel@alsa-project.org Subject: Re: ALSA bugs with 2.6.12-rc1 Message-ID: <20050404173453.GB4087@stusta.de> References: <42515358.7020101@blue-labs.org> <4251749B.5060603@gentoo.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4251749B.5060603@gentoo.org> User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1354 Lines: 39 On Mon, Apr 04, 2005 at 06:08:43PM +0100, Daniel Drake wrote: > David Ford wrote: > > It seems that 2.6.12-rc1 introduced an ALSA bug generating an oops for a > > null pointer. > > > > codec_semaphore: semaphore is not ready [0x1][0x300300] > > codec_read 0: semaphore is not ready for register 0x2c > > Unable to handle kernel NULL pointer dereference at virtual address > > 00000000 > > > > This happens on multiple machines, 32b and 64bit. I'll be happy to > > provide further information if needed. > > This only happens when you mismatch your kernel and alsa-lib versions, e.g. > running alsa-lib-1.0.9-rc2 with alsa-1.0.8 in-kernel drivers, or possibly > vice-versa. Are you saying the userspace interface of the ALSA kernel drivers has incompatible changes between minor versions of ALSA? If this is true, that's a serious bug. > Daniel cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/