>Dear Friends >I installed Ubuntu Netbook 10.10 in a partition alongside the provided >Windoze 7 in my new-last-week Samsung N145. >It's a lot easier to get into the system on my PC running Ubuntu 10.10. >As a relative newcomer to Linux I've been working at learning to use >Terminal and thought that was coming along nicely until I came upon my >current problem: I can't get the display to un-dim. >In Windoze mode the 'Fn' and 'up' or 'down' buttons control brightness >OK, but using these in Linux brings up an on-screen flickering slider >which doesn't work and necessitates an escape routine with the on-off >switch. >I got into 'Power Management Preferences' and the sliders there don't >work - the screen stays in power-saving rather-dim mode. >Clicked on 'Help' and there is lots of apparently useful stuff there and >a 'pinned post-it' : "Some sliders or option boxes may be disabled if >the GConf policy keys are not writable. This allows administrators to >lock down the actions that a user can select." >So I tried Terminal but can't find a way into GConf or >/app/gnome-power-manager/backlight/idle_brightness >When I first installed Linux on the machine, I am sure the brightness >was fine but I don't know what I did that changed it. > >Any ideas on how I could control the display backlight please? > >Tony Wood
Try the following (from French Ubuntu forum): sudo add-apt-repository ppa:voria/ppa sudo apt-get update && sudo apt-get upgrade sudo apt-get install samsung-tools samsung-backlight sudo reboot It appears on some systems the function keys begin working but the brightness does not change. In this case, try appending “acpi_backlight=vendor” to the GRUB_CMDLINE_LINUX line in Suspend / Resume below. GRUB_CMDLINE_LINUX=”acpi_sleep=nonvs acpi_backlight=vendor”
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