Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264174AbTFDVvD (ORCPT ); Wed, 4 Jun 2003 17:51:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264177AbTFDVvD (ORCPT ); Wed, 4 Jun 2003 17:51:03 -0400 Received: from smtp-out2.iol.cz ([194.228.2.87]:675 "EHLO smtp-out2.iol.cz") by vger.kernel.org with ESMTP id S264174AbTFDVu4 (ORCPT ); Wed, 4 Jun 2003 17:50:56 -0400 Date: Thu, 5 Jun 2003 00:03:56 +0200 From: Pavel Machek To: Andreas Mohr Cc: LKML Subject: Re: [PATCH] 2.5.70: add comment about console LCD backlight issues Message-ID: <20030604220356.GK333@elf.ucw.cz> References: <20030529122816.GB21147@rhlx01.fht-esslingen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030529122816.GB21147@rhlx01.fht-esslingen.de> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.3i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1668 Lines: 47 Hi! > a lot of people seem to be confused about (non-working) notebook display > blanking, so... > > - add verbose explanation about the whole notebook screen blanking situation > and a possible development direction to prominent place Please submit it to Rusty trivial patch monkey Russell . > I might actually be tempted to unify graphics hardware backlight handling > myself, since having a console that doesn't shut down the backlight properly > is mildly annoying... Yep, solving that somehow would be good. > Patch against vanilla 2.5.70. > > Andreas Mohr > > diff -urN linux-2.5.70.orig/drivers/video/console/vgacon.c linux-2.5.70/drivers/video/console/vgacon.c > --- linux-2.5.70.orig/drivers/video/console/vgacon.c 2003-05-28 17:57:07.000000000 +0200 > +++ linux-2.5.70/drivers/video/console/vgacon.c 2003-05-29 03:13:53.000000000 +0200 > @@ -661,6 +661,22 @@ > } > } > > +/* > + * vgacon_blank() is able to simply blank the screen, or to even switch > + * the monitor off in case of "Green", "Energy Star" monitors > + * (by switching off the sync signals using VESA mechanisms). > + * However, it is NOT able to switch off the *backlight* of (most?) > notebooks. Acurate, AFAICS. Why can't that stupid notebook manufacturers make it turn backlight off on VESA blank?! 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/