Laptop, screen brightness control inverted

English Hardware
1

I installed Opensuse 13.2 on a Acer ES1-511 laptop.

All work fine except the brightness control, which is inverted: 100% put off the screen, 10% is very dark, 0% is full power brightness.

That is not a big problem until I logout, the user selection/login screen has the brightness always set to 100% (screen off), so I cannot see anything and I have to force restart to auto-login and continue to use the laptop.

My question is: How can I solve this issue?

2

Any idea of where to begin to search, where to find information or any clue?

3

I still looking for a solution to this problem. Anyone has a suggestion?

4

Finally I solved it:

The problem is due to Intel i915 issue.

To solve the problem:
nano /etc/default/grub

in the line GRUB_CMDLINE_LINUX=""

Add the following content:
i915.invert_brightness=1

The resulted line is like:
GRUB_CMDLINE_LINUX=“i915.invert_brightness=1”