It didn't work. I then tried Fn+F9 and it blanked the screen. I pressed it again but it didn't unblank it. I touched the power button then Fn+F9 and the screen came to life. It had shut down the wireless connection and I couldn't get it back either by clicking on the icon or entering configuration and pressing connect. I had to reboot to get it working again. I did notice it reporting my internet connection as Eth0 for my Ethernet, which is not connected, and Eth1 for my wireless connection which does connect and works fine. I would have expected to see wlan0 for my wireless connection.Sometimes it's just the backlight that doesn't come back on. You may be able to get by pressing ctrl-alt-f1 then ctrl-alt-f4. Otherwise you can disable lid suspend using acpi-control.
How do I do
Otherwise you can disable lid suspend using acpi-control.