From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Iwai Subject: Re: Issues with HP DV4 laptop sound after Ubuntu Jaunty 9.04 upgrade Date: Tue, 05 May 2009 12:49:36 +0200 Message-ID: References: <49FD2446.7040001@wisc.edu> <49FF0923.60902@wisc.edu> Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by alsa0.perex.cz (Postfix) with ESMTP id EC2DF1037F5 for ; Tue, 5 May 2009 12:49:36 +0200 (CEST) In-Reply-To: <49FF0923.60902@wisc.edu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: jstalnak@wisc.edu Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org At Mon, 04 May 2009 10:26:27 -0500, Guy Stalnaker wrote: > > Hello again, Takashi, > > Can you think of why a new distribution might be the cause, or a change > that a new distribution makes, that would result in such behavior? The > new distribution includes a new kernel and a new version of xorg (I > think), so everything on top of the hardware is new. What's damned > peculiar is that the HTML output interface is always recognized > successfully. It's only the Audio device: ATI Technologies Inc SBx00 > Azalia (Intel HDA) on pci 00:14.2 that seems to have this issue. > > To add oddity to the issue, I brought the laptop to work this morning > and on boot the Audio device was successfully recognized and aplay -l > shows it a card 0!! > > I wonder ... do you think that it's possible that a keyboard, mouse, > printer, or some other USB device plugged into the laptop at boot could > affect something like this? That's really the only difference between > work and home. I guess it's an issue with ACPI or core PCI layer. Or suspend, if this happens only after suspend/resume and not after a fresh boot. In any way, I recommend you to report this on kernel bugzilla. Takashi