On 05/04/11 19:08, Ian Grody wrote:
I had this issue, the Fn keys need to be mapped to setpci commands
(do-able in xorg.conf somewhere)
However;
"setpci -s 00:02.0 F4.B=xx" Where xx is the desired brightness in HEX
will allow you to adjust the hardware brightness factor.
Hope it helps
On Tue, 2011-04-05 at 06:20 -0400, mattham...@aol.com wrote:
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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TYVM Ian and Matt.
See you at the Red Hat meeting on Saturday?
Tony Wood
(from Linux PC)
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