How to Fix Black Screen Problem Before Login on HP Pavilion Laptops running Ubuntu 12.04

Hello Linux Geeksters.

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This issue occurs on Ubuntu 12.04, running on Hewlett Packard (HP) Pavilion laptops.

If you get a black screen, whenever you start your laptop and before getting the Login Screen, this article may help you.

To fix the black screen problem, do this:

$ gksudo /etc/default/grub

Find the GRUB_CMDLINE_LINUX=” “ line and modify it to look like this:

GRUB_CMDLINE_LINUX=”acpi_osi=Linux acpi_backlight=vendor“

Update Grub:

$ sudo update-grub

After the reboot, your back light problem should be solved.

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