** Description changed: The problem appears in console mode only and it is that the backlight cannot be controlled with the Fn keys. It can neither be adjusted nor turned off. The machine runs Ubuntu Server 12.04.1 LTS and is Samsung N220 netbook with a sun readable PixelQi display. uname -a : Linux clterm 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ls /sys/class/backlight : intel_backlight samsung I have put acpi_backlight=vendor kernel parameter as setting acpi video backlight does not have any effect. This works ok: echo 200 |sudo dd of=/sys/class/backlight/intel_backlight/brightness This also works ok: echo 4 |sudo dd of=/sys/class/backlight/samsung/brightness The above commands work differently though. The first one allows controlling in great ranges, while the second controls the backlight within some bounds. + With acpi=off, the Fn keys function correctly in the console. + Your help is appreciated!
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1092517 Title: Cannot control backlight using the keyboard keys on Ubuntu Server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1092517/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
