To generate config file, if /etc/X11/nf doesn't exist. You can check to see if your system uses the thinkpad-acpi driver by using the following command:Ĭheck this page (See first paragraph & Diagnostic Techniques)Īnother thing I just show, have you edited /etc/X11/nf file? in your question you are pointing to some other location which I never heard of. If it is a thinkpad thinkpad-acpi.brightness_enable=1 parameter is also required. If above not working Also try with acpi_backlight=vendor only.
Have you updated grub ( sudo update grub) after you edit /etc/default/grub and rebooted? I am currently using the Nouveau driver, but switching to the Nvidia proprietary drivers made no difference.Īny other ideas? When is this bug going to be fixed? With all the reports I've come across I would think it would get a lot of attention. There is no nf file in 12.10 that I have found, so the solutions that suggest editing that file don't do me a whole lot of good. In /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash "RegistryDwords" "EnableBrightnessControl=1" Things I have tried include:Įditing /sys/class/backlight/acpi_video0/brightness I've tried all the solutions I could find around the Internet but none of them work. It is set to the brightest setting when I boot up and when I try to change it, I see the notification bar come up but the brightness doesn't actually change. My brightness control doesn't work with a fresh install of 12.10 (brand new laptop).
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