I have a Toshiba Satellite R830 laptop with Ubuntu 12.04.1 64 bit. The Fn + F6 and Fn + F7 buttons adjust brightness until I put my laptop on sleep.
On wakeup they don't work any longer. Is there a solution or a workaround to this issue?
brightnesskerneltoshiba
I have a Toshiba Satellite R830 laptop with Ubuntu 12.04.1 64 bit. The Fn + F6 and Fn + F7 buttons adjust brightness until I put my laptop on sleep.
On wakeup they don't work any longer. Is there a solution or a workaround to this issue?
Best Answer
I found a better solution than the one selected above.
gksudo gedit /etc/default/grub
.GRUB_CMDLINE_LINUX_DEFAULT=
and modify it as follows:GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
.sudo update-grub
.Problem solved.
More info here: https://wiki.ubuntu.com/Kernel/Debugging/Backlight
Edit
This solution no longer works on 13.10 and 14.04.
A solution that does is creating an xorg configuration file:
sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf
to create the file.sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf
to edit its content.Log out and in again.
Source: Fix Brightness Control Not Working for Ubuntu 13.10 & 14.04