Luming I've got 2.6.21-rc5 running on a Toshiba Satellite Pro laptop. The ACPI video drivers seems to supply 2 brightness levels in proc, but nothing in /sys/backlight, and the toshiba_acpi driver seems to supply 8 levels in /proc. what am I missing? thanks, -Len loading the video driver, I see this: lenb@toshiba:/proc/acpi/video> ls -R .: VGA ./VGA: CRT DOS info LCD POST POST_info ROM TV ./VGA/CRT: brightness EDID info state ./VGA/LCD: brightness EDID info state ./VGA/TV: brightness EDID info state lenb@toshiba:/proc/acpi/video/VGA/LCD> cd /proc/acpi/video/VGA/LCD lenb@toshiba:/proc/acpi/video/VGA/LCD> su Password: toshiba:/proc/acpi/video/VGA/LCD # echo 0 > brightness (this dimmed the screen to minimum) toshiba:/proc/acpi/video/VGA/LCD # echo 40 > brightness (this make the screen max brightness) toshiba:/proc/acpi/video/VGA/LCD # echo 100 > brightness bash: echo: write error: Invalid argument toshiba:/proc/acpi/video/VGA/LCD # echo 20 > brightness toshiba:/proc/acpi/video/VGA/LCD # echo 10 > brightness toshiba:/proc/acpi/video/VGA/LCD # echo 0 > brightness toshiba:/proc/acpi/video/VGA/LCD # echo 40 > brightness toshiba:/proc/acpi/video/VGA/LCD # echo 50 > brightness toshiba:/proc/acpi/video/VGA/LCD # echo 30 > brightness Only the values of 0 and 40 have any effect, the others are a NOP toshiba:/proc/acpi/video/VGA/LCD # cd /proc/acpi/toshiba/ toshiba:/proc/acpi/toshiba # ls fan keys lcd version video toshiba:/proc/acpi/toshiba # cat lcd brightness: 3 brightness_levels: 8 toshiba:/proc/acpi/toshiba # echo brightness:0 > lcd toshiba:/proc/acpi/toshiba # echo brightness:2 > lcd toshiba:/proc/acpi/toshiba # echo brightness:3 > lcd toshiba:/proc/acpi/toshiba # echo brightness:4 > lcd toshiba:/proc/acpi/toshiba # echo brightness:5 > lcd toshiba:/proc/acpi/toshiba # echo brightness:6 > lcd toshiba:/proc/acpi/toshiba # echo brightness:7 > lcd toshiba:/proc/acpi/toshiba # echo brightness:8 > lcd bash: echo: write error: Invalid argument toshiba:/proc/acpi/toshiba # All of these 8 give a different brightness video.c: brightness 0 = toshiba_acpi brightness 0 video.c: brightness 40 = toshiba_acpi brightness 3 rmmod toshiba_acpi makes no difference. toshiba:/proc/acpi/video/VGA/LCD # ls /sys/class/backlight/ toshiba:/proc/acpi/video/VGA/LCD # toshiba:/proc/acpi/video/VGA/LCD # gunzip -dc /proc/config.gz |grep BACKLIGHT CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_BACKLIGHT_CLASS_DEVICE=y # CONFIG_BACKLIGHT_PROGEAR is not set CONFIG_FB_BACKLIGHT=y CONFIG_FB_RADEON_BACKLIGHT=y - 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
