From: Tino Keitel <tino.keitel@gmx.de>
To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: 2.6.28 regression: xbacklight broken on ThinkPad X61s
Date: Mon, 5 Jan 2009 09:39:11 +0100 [thread overview]
Message-ID: <20090105083911.GA3694@x61> (raw)
[-- Attachment #1: Type: text/plain, Size: 466 bytes --]
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
[-- Attachment #2: backlight_2.6.27 --]
[-- Type: text/plain, Size: 2426 bytes --]
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:
[-- Attachment #3: backlight_2.6.28 --]
[-- Type: text/plain, Size: 1678 bytes --]
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:
next reply other threads:[~2009-01-05 8:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-05 8:39 Tino Keitel [this message]
2009-01-05 9:06 ` 2.6.28 regression: xbacklight broken on ThinkPad X61s Zhang Rui
2009-01-05 11:05 ` Matthew Garrett
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