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I have a Sony Vaio SVE15116EN with AMD Radeon HD 7650 graphics card. I am currently using Ubuntu 12.10. My brightness controls are not working but sound controls are working fine. I have also tried proprietary drivers also but no luck. I have tried controlling brightness with terminal but it also did not work. Please can anyone tell me what can i do? I have been searching for the solution almost for a week. Any ideas?

qbi
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Ankur Patel
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  • The below link helped me, now I am able to adjust my brightness http://superuser.com/questions/400417/brightness-settings-gone-how-do-i-bring-it-back –  Jan 04 '15 at 11:57

3 Answers3

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I found the solution:

  1. Download the amd radeon driver from here
  2. Run terminal and tupesudo apt-get install linux-headers-3.5.0-17-generic
  3. Go to directory where you have downloaded the zip file of driver which might be /home/your_username/Downloads. Extract the zip file there. You will see a .run file.
  4. Run command: sudo sh amd-driver-installer-catalyst-13.1-linux-x86.x86_64.run
  5. It will open the installer window. Now install the driver. After finishing it will ask you to reboot but don't.
  6. Open a new terminal and type: sudo amdconfig --initial
  7. Now reboot your system. Your brightness control will work fine.
Eliah Kagan
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Ankur Patel
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In case if you use radeon graphics this may help you

echo 200 | sudo tee /sys/class/backlight/radeon_bl0/brightness
Bhushan Pawar
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Found a yet better way to do this with GUI based installation method, worked well for my card ati card 7650 on sony vaio http://www.noobslab.com/2013/04/install-ati-amd-catalyst-drivers-in.html

Divyansh Ojha
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    Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. – Aditya Apr 29 '13 at 17:00
  • GUI based installation method is also good. But the command line method also works when you get the low graphics error on Ubuntu start-up and you won't be able to use GUI at all. But you can do ctrl-alt-F1 and use the command line method to solve the low graphics problem. – Ankur Patel Jun 06 '13 at 08:28