On Sat, 29 Oct 2011 20:31:03 +0000 (UTC), Camaleón writes: > What's the output of "ls -l /sys/class/backlight"? > > If I follow the instructions of the section named "The /sys/class/ > backlight interface" I can indeed see and set the backlight values as > stated. For instance, to put the backlight at its maximum value, as root > I can run: > > echo 10 > /sys/class/backlight/acpi_video0/brightness
My configurations are as follows. --8<---------------cut here---------------start------------->8--- $ ls -l /sys/class/backlight/ total 0 lrwxrwxrwx 1 root root 0 Oct 29 21:48 acpi_video0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0/ $ ls -l /sys/class/backlight/acpi_video0/ total 0 -r--r--r-- 1 root root 4096 Oct 29 21:48 actual_brightness -rw-r--r-- 1 root root 4096 Oct 30 17:32 bl_power -rw-r--r-- 1 root root 4096 Oct 30 17:32 brightness lrwxrwxrwx 1 root root 0 Oct 30 17:32 device -> ../../../0000:01:00.0/ -r--r--r-- 1 root root 4096 Oct 30 17:32 max_brightness drwxr-xr-x 2 root root 0 Oct 30 17:32 power/ lrwxrwxrwx 1 root root 0 Oct 29 21:48 subsystem -> ../../../../../../class/backlight/ -r--r--r-- 1 root root 4096 Oct 30 17:32 type -rw-r--r-- 1 root root 4096 Oct 29 21:48 uevent $ cat /sys/class/backlight/acpi_video0/brightness 7 $ cat /sys/class/backlight/acpi_video0/max_brightness 7 --8<---------------cut here---------------end--------------->8--- First, I tried to alter the "brightness": --8<---------------cut here---------------start------------->8--- $ echo 1 | sudo tee /sys/class/backlight/acpi_video0/brightness 1 $ cat /sys/class/backlight/acpi_video0/brightness 1 --8<---------------cut here---------------end--------------->8--- Nothing happens. --8<---------------cut here---------------start------------->8--- $ echo 1 | sudo tee /sys/class/backlight/acpi_video0/actual_brightness tee: /sys/class/backlight/acpi_video0/actual_brightness: Permission denied 1 --8<---------------cut here---------------end--------------->8--- Still nothing happens. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87hb2qbibi....@alamut.ozun.int
