Fix no screen brightness on boot problem

I recently upgraded my laptop to a brand new Lenovo Y410P and promptly replaced Windows 8 with a Linux install. Unfortunately I immediately ran into a very strange driver(?) issue where, on boot, the computer would default to the absolute lowest screen brightness level. This meant that I would need to manually adjust the screen brightness up just to see the login screen. Thankfully after some help from the excellent people over on the Ubuntu Forums I managed to find a very easy work around.

1) As root open up /etc/default/grub

I did this by simply issuing the following command:

sudo nano /etc/default/grub

2) Find the line that says GRUB_CMDLINE_LINUX= and add “acpi_backlight=vendor” to the list of options.

3) From a terminal run this command to update GRUB

sudo update-grub

4) Reboot!

That’s pretty much it. My computer now boots with the correct screen brightness as one would expect.




3 Trackbacks / Pingbacks

  1. Applications/Games-Related Links for September-October 2013 | Techrights
  2. Screen brightness work around (part 2) | The Linux Experiment
  3. The Linux Experiment Post Roundup (January 2014) | Tyler Burton

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