I cannot reduce the screen brightness in Ubuntu 13.04, my device is an Acer Aspire 5742. Ubuntu systems settings says the graphics driver is "Intel® Ironlake Mobile x86/MMX/SSE2" but my laptop comes with "Intel HD Graphics". So I assume it's a problem with my graphic drivers. It would be great if some one could tell me how to uninstall my current driver and install the correct one. Thank you.
Installing graphics driver for Intel has become so easy.. You can use Intel Linux Graphics Installer to install/update your currentt graphics driver. After installation it will automatically scans your graphics device and install/update as needed.
Follow this instruction to install it:
To fix your brightness you can try following trick:
Open terminal(CTRL+ALT+T) and execute following command:
then change the line
Then save the file and close. Finally execute following commands:
Hope after reboot your problem would be solved. Reply for further assistance..