Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756282AbXJZRwC (ORCPT ); Fri, 26 Oct 2007 13:52:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752684AbXJZRvy (ORCPT ); Fri, 26 Oct 2007 13:51:54 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:36245 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752563AbXJZRvy (ORCPT ); Fri, 26 Oct 2007 13:51:54 -0400 Date: Fri, 26 Oct 2007 19:51:43 +0200 From: Pavel Machek To: Krzysztof Halasa Cc: Andrew Morton , sylvain.meyer@worldonline.fr, linux-kernel@vger.kernel.org, "Antonino A. Daplas" , linux-fbdev-devel@lists.sourceforge.net Subject: Re: [PATCH] Intel FB pixel clock calculation fix Message-ID: <20071026175143.GB1573@elf.ucw.cz> References: <20070910225221.f0eaf22c.akpm@linux-foundation.org> 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/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1215 Lines: 30 On Tue 2007-09-11 14:18:57, Krzysztof Halasa wrote: > Andrew Morton writes: > > >> Intel framebuffer mis-calculated pixel clocks. > > > and... what are the consequences of this miscalculation? I need to know > > such things so that I can decide whether a change is needed in 2.6.23. And > > 2.6.22. > > The pixel clock (and thus both H and V sync) will be slower than > requested, so if you set the minimum allowed the display may not > sync. In case of really old CRT display it could theoretically > damage it. > > I'm using it with PAL TV (using RGB input - SCART connector) and > the bug prevented it from working at all (TV requirements are more > strict and made the bug visible). > > I think 2.6.22 would be overkill, .23 - not sure. I don't think this is -stable kind of bug. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/