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I am having problem with Ubuntu 13.10 brightness control. My brightness shortcut keys (Fn + F5/F6) worked in 12.10 and 13.04 but they have stopped working in 13.10.

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 following options, but none of them has worked so far:

  1. Installing Additional Drivers from Software Centre
  2. Finding /etc/X11/Xorg.con file for editing but it does not exist for me.
  3. Visited Software & Updates > Additional Drivers tab, but it shows nothing saying 'No additional drivers available' and 'No proprietary drivers are in use'.

Thanks in advance for any help.

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1 Answer 1

Reset to default
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Try this.

  • Execute $ sudo gedit /etc/default/grub

  • Modify the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

  • Save the changes.

  • Execute $ sudo update-grub

  • Reboot.

Archlinux Wiki on brightness controls here.

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  • Thanks @Pavel for your response. I tried this approach, with an additional reference to another similar question askubuntu.com/questions/366710/…
    – Ninad
    Nov 13, 2013 at 9:36
  • But it did not work. Is there anything I could check with driver installations? Or does Ubuntu installation come packaged with sufficient drivers to make all standard features of a laptop work out-of-box?
    – Ninad
    Nov 13, 2013 at 9:43
  • Your laptop may need some more tweaking as mentioned on this Arch wiki page in the ACPI section: wiki.archlinux.org/index.php/backlight. Try it.
    – Pavel
    Nov 13, 2013 at 14:35
  • I am able to set brightness from Terminal using commands echo 4000 | sudo tee /sys/class/backlight/intel_backlight/brightness and cat /sys/class/backlight/intel_backlight/brightness. Could you suggest a way to trigger them using Fn+F5 or Fn+F6?
    – Ninad
    Nov 13, 2013 at 19:38
  • Before we reach there: have you tried ALL grub file options from the Arch manual? And can you change brightness from System Settings > Brightness & Lock?
    – Pavel
    Nov 13, 2013 at 21:07

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