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	Replies: 2 - Pages: 1 - Last Post: 23-Jan-2012 08:35 Last Post By: Paolo30

z830

Posts: 1
Registered: 22/01/12

Portege Z830: cannot change display brightness using FN buttons in XUbuntu
Posted: 22-Jan-2012 19:45

Hi everybody,

It is not possible to control the luminosity by the Fn button on my new Portege Z830 - Xubuntu 11.10

The luminosity is at the maximum and too high.

Do you know how to control it ?

Thanks for your time,

James

Silas

Posts: 2,124
Registered: 10/02/05

Re: Portege Z830: cannot change display brightness using FN buttons in XUbu
Posted: 23-Jan-2012 07:24

in response to: z830

Hello

As far as I know such stuff is controlled by software. Problem is that Toshiba doesn’t support Linux and doesn’t offer any software that controls this.
What you can do is to visit some Linux forum and exchange your experiences there.

Maybe some of Linux experts there have a idea how to do it.

Paolo30

Posts: 3,131
Registered: 21/09/09

Re: Portege Z830: cannot change display brightness using FN buttons in XUbuntu
Posted: 23-Jan-2012 08:35

in response to: z830

Hi

You can solve this changing some values in Grub

Solution for Grub 2
gksudo gedit /etc/default/grub
Search line
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

And change this in
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

For Grub legacy
gksudo gedit /boot/grub/menu.lst

search line

defoptions=quiet

Change in

defoptions=quiet acpi_osi=Linux acpi_backlight=vendor

Then save the changes and close the gedit.
Then update the Grub 2 or Grub legacy:
sudo update-grub

and restart the system sudo reboot

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