When I fire up the latest Linus tree on my thinkpad t61p I get: thinkpad_acpi: ThinkPad ACPI Extras v0.17 thinkpad_acpi: http://ibm-acpi.sf.net/ thinkpad_acpi: ThinkPad BIOS 7LET44WW (1.14 ), EC 7KHT22WW-1.06 thinkpad_acpi: Lenovo ThinkPad T61p thinkpad_acpi: radio switch found; radios are enabled ACPI: Lid Switch [LID] input: Sleep Button (CM) as /class/input/input6 ACPI: Sleep Button (CM) [SLPB] thinkpad_acpi: standard ACPI backlight interface available, not loading native one... and /sys/class/backlight/thinkpad_screen/brightness is no longer present, so my `brightness' script no longer works. That, my friends, is a regression. Here's my script: ( 0 sh -c "echo $1 > /proc/acpi/sony/brightness" 0 sh -c "echo $1 > /proc/acpi/sony/brightness_default" 0 sh -c "echo $1 > /sys/class/backlight/sony/brightness" 0 sh -c "echo $1 > /sys/class/backlight/thinkpad_screen/brightness" ) 2>/dev/null which rather shows how pathetic we are in this area. Ho hum. So I go hunting around and find /sys/class/backlight/acpi_video0/ and /sys/class/backlight/acpi_video1/ Why are there two of them? Both of these have a `brightness' entry which has contents of 100. When I set that to 10, the screen's brightness is not reduced. So as far as I can tell, we have lost the ability to alter the brightness of the screen on this machine. - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
