I'm using Ubuntu 11.04 Natty and when I installed it I had a problem with blank screen on startup and found a solution but I have the same problem when it is inactive and goes blank screen, it won't come back, so I have to restart.

Any ideas?

Thanks in advance for any help.

This is what solved my first problem:

When you start editing the /etc/rc.local and add before exit 0:

setpci -s 00:02.0 F4.B=00

Edit /etc/default/grub, edit the line GRUB_CMDLINE_LINUX_DEFAULT:

GRUB_CMDLINE_LINUX_DEFAULT = "quiet splash acpi_osi = Linux"

Update grub with:

sudo update-grub2