On Sun, 30 Oct 2011 17:38:41 +0200, Volkan YAZICI wrote: > 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.
(...) > 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. That's bad. Reducing the value of brightness has to be applied in real time, at least that's what happens here. I'm using an intel card/driver, what's yours? > --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. That's normal. "actual_brightness" file is not writeable by root user, just read only. Greetings, -- Camaleón -- 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/pan.2011.10.30.16.02...@gmail.com
