How to make backlight work on Acer 5732z?
- by Dude Random21
I want to run 12.04 on my Acer Aspire 5732z. I know from research that these computers have issues with the backlight on Ubuntu. So I tried a couple of solutions:
The sudo lightdm restart method. I get no change at all.
The sudo setpci -s 00:02.0 F4.B=30 method.
This so far has been the most effective. I first tried it in the F1
console, right away I get the screen back, problem is going back to
the desktop it goes back to being black. So I tried it from a
terminal window and it works as well but as soon as I unplug my
external monitor the screen turns black again and doesn't come back.
If I plug the monitor back in the screen stays black and the only
thing I see is the mouse pointer. From here I go back into console
(which I am able to see) and reboot from there.
The sudo sed -i 's/GRUB_CMDLINE_LINUX=""/GRUB_CMDLINE_LINUX="acpi_osi=Linux"/g /etc/default/grub method.
This one I got no instant change and after reboot still no change.
I'm open to pretty much any suggestions you may have.
