Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965085AbXBZMfx (ORCPT ); Mon, 26 Feb 2007 07:35:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965235AbXBZMfx (ORCPT ); Mon, 26 Feb 2007 07:35:53 -0500 Received: from twin.jikos.cz ([213.151.79.26]:60701 "EHLO twin.jikos.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965085AbXBZMfw (ORCPT ); Mon, 26 Feb 2007 07:35:52 -0500 Date: Mon, 26 Feb 2007 13:35:48 +0100 (CET) From: Jiri Kosina To: Richard Purdie cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.21-rc1 dims my LCD In-Reply-To: <1172490091.5824.30.camel@localhost.localdomain> Message-ID: References: <1172490091.5824.30.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1568 Lines: 41 On Mon, 26 Feb 2007, Richard Purdie wrote: > > When I hit the keyboard, the brightness stays low (it's 50% of light > > or so, so I could read what's on the screen, but it's uncomfortably > > dim), and I have to manually raise the brightness on the LCD. Quite > > annoying :) I have bisected this to your commit > > 994efacdf9a087b52f71e620b58dfa526b0cf928 > Which framebuffer driver and backlight driver are you using? > ("ls /sys/class/backlight/" will show which backlight it is) It's IBM: $ ll /sys/class/backlight/ drwxr-xr-x 2 root root 0 Feb 26 13:28 ibm At the time the brightness goes low, there is '0' in /sys/class/backlight/ibm/actual_brightness and /sys/class/backlight/ibm/brightness Echoing '7' into /sys/class/backlight/ibm/brightness gets the brightness back again to normal. > Is the machine in active use when it dims or at idle and does the screen > blank at the same time it dims? If so, does the keypress unblank the > screen (but not change the brightness)? It doesn't blank at the time it dims - it just decreases brightness. I will do some more tests, but it seemed on a first sight that it happens only when the machine is idle. > Also, is this on a console or under something like X? I observed it only on console, but didn't experiment with it too much yet. -- Jiri Kosina - 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/