Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261785AbUDCPWo (ORCPT ); Sat, 3 Apr 2004 10:22:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261804AbUDCPWo (ORCPT ); Sat, 3 Apr 2004 10:22:44 -0500 Received: from gprs214-163.eurotel.cz ([160.218.214.163]:20864 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S261785AbUDCPWm (ORCPT ); Sat, 3 Apr 2004 10:22:42 -0500 Date: Sat, 3 Apr 2004 17:22:28 +0200 From: Pavel Machek To: Takashi Iwai Cc: Rajsekar , linux-kernel@vger.kernel.org Subject: Re: alsamixer muting when restoring from suspend. Message-ID: <20040403152227.GA212@elf.ucw.cz> References: <20040402205723.GJ195@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1553 Lines: 37 Hi! > > > > This I think is not a problem but rather a subtle bug. > > > > > > > > Alsamixer by default mutes all channels when loaded. > > > > So when I `swsusp' my comp while I listen to music and restore the music > > > > plays from where it left alright, but the channels are muted. > > > > Is there a way to unmute them implicitly when restoring. > > > > > > which driver? > > > not all drivers have suspend/resume callbacks. > > > > Could it be solved at higher layer, perhaps? Setting volume is common > > to all drivers, and some kind of generic_alsa_suspend every alsa > > driver would call might help... > > the problem is also that you need to reinitialize the chip after > resume. the restoration of mixer config could be done by calling > "alsactl store" at the suspend and "alsactl restore" at the resume in > the user space. can apmd work for such a purpose even for software > suspend? Userspace should not be involved in suspend/resume. Having in-kernel equivalent of alsactl store / alsactl restore might help alsa driver authors... And might be enough for suspend-to-disk to +/- work. (Well, unless sound was playing when user requested suspend, that one needs proper support). Pavel -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?] - 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/