From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751904AbcEOTbL (ORCPT ); Sun, 15 May 2016 15:31:11 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:43429 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751139AbcEOTbK (ORCPT ); Sun, 15 May 2016 15:31:10 -0400 Date: Sun, 15 May 2016 21:31:06 +0200 From: Pavel Machek To: pali.rohar@gmail.com, sre@kernel.org, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com Subject: Can not play audio with screen off Message-ID: <20160515193106.GA18685@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! I'm playing some more with N900, this time I'd like to use it as a alarm clock... And now I realized I can not, because system performance is so horrible with screen off that mpg123 + pulseaudio skips horribly. This is without tweaking serial parameters, so CPU is definitely not going into the idle/off modes. Loading CPU fixes the issue (I used cat /dev/zero > /dev/null). Hmm. And it seems to work better if I ssh in and launch mpg123 remotely. Weird. Kernel 4.5-rc0. Will try on different ones. Any ideas? Is there interface to tell kernel that better performance is needed for a while? Thanks, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Sun, 15 May 2016 21:31:06 +0200 Subject: Can not play audio with screen off Message-ID: <20160515193106.GA18685@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi! I'm playing some more with N900, this time I'd like to use it as a alarm clock... And now I realized I can not, because system performance is so horrible with screen off that mpg123 + pulseaudio skips horribly. This is without tweaking serial parameters, so CPU is definitely not going into the idle/off modes. Loading CPU fixes the issue (I used cat /dev/zero > /dev/null). Hmm. And it seems to work better if I ssh in and launch mpg123 remotely. Weird. Kernel 4.5-rc0. Will try on different ones. Any ideas? Is there interface to tell kernel that better performance is needed for a while? Thanks, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html