Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752543AbZAEIj0 (ORCPT ); Mon, 5 Jan 2009 03:39:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751661AbZAEIjR (ORCPT ); Mon, 5 Jan 2009 03:39:17 -0500 Received: from eazy.amigager.de ([213.239.192.238]:41224 "EHLO eazy.amigager.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751643AbZAEIjQ (ORCPT ); Mon, 5 Jan 2009 03:39:16 -0500 Date: Mon, 5 Jan 2009 09:39:11 +0100 From: Tino Keitel To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Subject: 2.6.28 regression: xbacklight broken on ThinkPad X61s Message-ID: <20090105083911.GA3694@x61> Mail-Followup-To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="EVF5PPMfhYS0aIcm" Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5179 Lines: 139 --EVF5PPMfhYS0aIcm Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi, xbacklight is broken as of 2.6.28 on my ThinkPad X61s. It works with 2.6.27(.8) The difference I can see between both kernels is that 2.6.27 has 2 backlight ACPI devices, whereas 2.6.28 only has one device. With 2.6.28, I can use xbacklight and see the values change in xbacklight -get, but the actual display brightness doesn't change. Attached are 2 files with diagnostic output from 2.6.27 and 2.6.28. Any hints how to solve or debug this? Regards, Tino --EVF5PPMfhYS0aIcm Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="backlight_2.6.27" dmesg: acpi device:03: registered as cooling_device2 input: Video Bus as /class/input/input8 ACPI: Video Device [VID] (multi-head: yes rom: no post: no) acpi device:08: registered as cooling_device3 input: Video Bus as /class/input/input9 ACPI: Video Device [VID1] (multi-head: yes rom: no post: no) xrandr --prop: Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024 VGA disconnected (normal left inverted right x axis y axis) LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 246mm x 185mm EDID_DATA: 00ffffffffffff0030ae004000000000 000f010380191278eaed7591574f8b26 21505421080001010101010101010101 01010101010128150040410026301888 3600f6b900000018ed10004041002630 18883600f6b9000000180000000f0061 43326143280f01004ca3584a000000fe 004c544e313231584a2d4c30370a0000 PANEL_FITTING: full supported: center full_aspect full BACKLIGHT_CONTROL: kernel supported: native legacy combination kernel BACKLIGHT: 10 (0x0000000a) range: (0,15) 1024x768 50.0*+ 60.0 40.0 800x600 60.3 640x480 60.0 59.9 Xorg log: (II) intel(0): found backlight control method /sys/class/backlight/acpi_video1 sysfs: /sys/class/backlight/acpi_video0/subsystem/acpi_video1/bl_power:0 /sys/class/backlight/acpi_video0/subsystem/acpi_video1/brightness:10 /sys/class/backlight/acpi_video0/subsystem/acpi_video1/actual_brightness:10 /sys/class/backlight/acpi_video0/subsystem/acpi_video1/max_brightness:15 /sys/class/backlight/acpi_video0/subsystem/acpi_video1/power/wakeup: /sys/class/backlight/acpi_video0/bl_power:0 /sys/class/backlight/acpi_video0/brightness:9 /sys/class/backlight/acpi_video0/actual_brightness:12 /sys/class/backlight/acpi_video0/max_brightness:15 /sys/class/backlight/acpi_video0/power/wakeup: /sys/class/backlight/acpi_video1/subsystem/acpi_video0/bl_power:0 /sys/class/backlight/acpi_video1/subsystem/acpi_video0/brightness:9 /sys/class/backlight/acpi_video1/subsystem/acpi_video0/actual_brightness:12 /sys/class/backlight/acpi_video1/subsystem/acpi_video0/max_brightness:15 /sys/class/backlight/acpi_video1/subsystem/acpi_video0/power/wakeup: /sys/class/backlight/acpi_video1/bl_power:0 /sys/class/backlight/acpi_video1/brightness:10 /sys/class/backlight/acpi_video1/actual_brightness:10 /sys/class/backlight/acpi_video1/max_brightness:15 /sys/class/backlight/acpi_video1/power/wakeup: --EVF5PPMfhYS0aIcm Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="backlight_2.6.28" dmesg: acpi device:03: registered as cooling_device2 input: Video Bus as /class/input/input7 ACPI: Video Device [VID] (multi-head: yes rom: no post: no) xrandr --prop: Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024 VGA disconnected (normal left inverted right x axis y axis) LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 246mm x 185mm EDID_DATA: 00ffffffffffff0030ae004000000000 000f010380191278eaed7591574f8b26 21505421080001010101010101010101 01010101010128150040410026301888 3600f6b900000018ed10004041002630 18883600f6b9000000180000000f0061 43326143280f01004ca3584a000000fe 004c544e313231584a2d4c30370a0000 PANEL_FITTING: full supported: center full_aspect full BACKLIGHT_CONTROL: kernel supported: native legacy combination kernel BACKLIGHT: 5 (0x00000005) range: (0,15) 1024x768 50.0*+ 60.0 40.0 800x600 60.3 640x480 60.0 59.9 Xorg log: (II) intel(0): found backlight control method /sys/class/backlight/acpi_video0 sysfs: /sys/class/backlight/acpi_video0/actual_brightness:5 /sys/class/backlight/acpi_video0/bl_power:0 /sys/class/backlight/acpi_video0/brightness:5 /sys/class/backlight/acpi_video0/max_brightness:15 /sys/class/backlight/acpi_video0/power/wakeup: /sys/class/backlight/acpi_video0/subsystem/acpi_video0/bl_power:0 /sys/class/backlight/acpi_video0/subsystem/acpi_video0/brightness:5 /sys/class/backlight/acpi_video0/subsystem/acpi_video0/actual_brightness:5 /sys/class/backlight/acpi_video0/subsystem/acpi_video0/max_brightness:15 /sys/class/backlight/acpi_video0/subsystem/acpi_video0/power/wakeup: --EVF5PPMfhYS0aIcm-- -- 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/