Dim/Dark Screen on Acer Aspire

Question

I do have WUBI on my desktop, but that computer is too laggy so I installed WUBI on my Acer Aspire laptop. Everything works fine except the screen is too dark. I tried to reinstall WUBI but nothing. I need to use the flash-light to see what is on the screen. I tried a program called "brightness indicator" . I tried with sudo apt-get install acpi, but nothing. I updated all my packages and still nothing. Please some help will be appreciated.

Note: Do not ask me about graphics card, i do not know anything about it >_<

Answer 1

Try system settings -> screen (has a lock symbol) -> uncheck "Dim to save power"

Answer 2

Well I assume you are using a laptop having backlight issue in ubuntu, probably emachines(old acer) laptops shows off. I recommend you to create file and add contents as follows.

1. Become Root .

sudo -i

2. Create a new file

gedit /etc/pm/sleep.d/99_backlight

3. Enter the following contents in it.

#!/bin/sh

#run 'setpci -s 00:02.0 F4.B=00' when waking up

case "$1" in
        thaw|resume)
           setpci -s 00:02.0 F4.B=00
            ;;
esac

4. Save the file.
5. Make it executable

sudo chmod +x /etc/pm/sleep.d/99_backlight

6. Reboot your system.

sudo reboot