1

I just installed Xubuntu 13.04 on a new Dell XPS 13 Ultrabook. When I boot up the screen brightness is EXTREMELY dim. Adjusting the screen brightness doesn't do anything. This is obviously a very new bug with 13.04.

Any ideas?

2 Answers 2

0

Along with @GM-Script-Writer-62850's answer, if you're using an EFI BIOS boot, you ned to go into the BIOS setup and set "Load Legacy Rom" to Enabled.

I have experimented with the minimal GRUB line to get this working and I only need acpi_osi=Linux

AFAIK Legacy is anything not Windows 8, and I've not experienced any performance hit.

0

here are a couple kernel boot parameters you can try

  • acpi_osi=Linux
  • acpi_backlight=vendor
  • acpi_osi='!Windows 2012'


This is there you add that code, I had to use the 3ed one to get mine working right, it may be necessary to use 1 or 3 combined with the second one
The file to edit is :
/etc/default/grub
once you edit it run sudo update-grub then reboot

3
  • never ever seen acpi_osi='!Windows 2012' ...
    – Qasim
    Apr 27, 2013 at 3:33
  • i got it from a kernel dev here Apr 27, 2013 at 3:44
  • i did google ...ty for updating the information...
    – Qasim
    Apr 27, 2013 at 3:45

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .