Comment 13 for bug 759104

I have been trying to install Ubuntu 11.04 on an Acer Aspire 5736Z. I installs, and gets to reboot, where as soon as the log in page appears, the backlight turns off, at the same time as the drums sound. I have tried all sorts, since Natty came out. I have tried installing using the update manager, fresh install, fresh install using alternative cd, and now installing using .deb install found here http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.0-rc1-oneiric/ all of which the same problem occurs, as it is booting, just as the log in page appears, the back light is turned off. I have added 'GRUB_GFXPAYLOAD_LINUX=TEXT' to /etc/default/grub/ updated grub rebooted still nothing. I am convinced it is a backlight problem, if it could found out why the backlight is turned off, then I could get it to work. I can actually blindly once the log on page is there, click on enter, add my password, and Natty seems to load, as I get the music. But its just a black screen. Hope somebody can help?