Given Henrique's reply that the glitches I'm seeing are mainly kernel ACPI video bugs, I now have the video module blacklisted and am loading thinkpad_acpi 0.18-20071203 with brightness_enable=1. I see a "/sys/class/backlight/thinkpad_screen" device directory, with "brightness" and "actual_brightness" files under that. If I use the brightness adjustment keys (Fn+Home, Fn+End), the value in "actual_brightness" changes over the range 0-15. However, the actual display brightness remains unchanged. I can change the backlight level manually by echoing a value from 0-15 into "brightness", but if I don't do that, "actual_brightness" changes without changing the actual brightness. A similar thing is happening with "/proc/acpi/ibm/brightness". Its contents change when I use the brightness keys, but the actual display brightness remains unchanged. I can echo "level 0" through "level 15" into "/proc/acpi/ibm/brightness" to change the level manually, but I thought that shouldn't be necessary. Bug? Misunderstanding? What's going on here? ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
