I had a similar problem with a Dell Latitude D610 running Dapper Flight 6. My 
laptop would seemingly suspend fine, but when I powered back on the screen 
would remain off, but the system seemed to be live.

I scoured dozens of search results before finding this:

http://www.kcore.org/?menumain=4&menusub=2

I created a script called 01-wakeuplcd.sh in /etc/acpi/resume.d. Inside that I 
simply placed echo 0x80000001 > /proc/acpi/video/VID/LCD/state

Laptop now seems to be suspending to RAM and resuming ok.
-- 
Suspend/Hibernate do not function on Dell Inspiron 9300
https://launchpad.net/malone/bugs/30124


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