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I got this problem with brightness on my fresh xubuntu 13.10 install..
It ain't inc/decrease the screen brightness when pressing Fn+F5/F6 !!

I've tried some solutions like setting these values in the /etc/default/grub file and sudo updating grub (this worked for me on my previous xubuntu 13.04 install)

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor"

But still not working though :/

I have got a Sony VAIO VPCEJ3B1E running xubuntu 13.10 x64bit and an NVidia GeForce 410M and using the propritory drivers 319

Thanks in advance!

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I am having the same problem with Ubuntu 13.10 install. My brightness shortcut keys (Fn + F5/F6) worked in 12.10 as well as 13.04.

I am using Sony Vaio SVE15113ENB with VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09). Any help is appreciated.

I have tried:

  1. Installing Additional Drivers from Software Centre
  2. Finding /etc/X11/Xorg.con file but it does not exist for me.
  3. Modifying grub file and sudo updating grub and then reboot.
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