Cannot adjust brightness on my Thinkpad T430.

This doesn't work anymore: Ubuntu 10.04 Cant Adjust brightness on my lenovo Thinkpad?

Is there another way to fix this?


Already found a solution. Add a acpi_osi='!Windows 2012' option to /etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="splash quiet acpi_osi='!Windows 2012'"

And then run:

sudo update-grub

Source: https://help.ubuntu.com/community/AsusZenbookPrime#Ubuntu_13.04


Update your Kernel should fix this:

sudo apt-get dist-upgrade

Bug is fixed:


Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.