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
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:
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:
