I've recently installed lubuntu 12.04 LTS on an old machine:
Dell Latitude D600
- Processor: Intel centrino
- RAM: 2GB
- video card: ATI
I put the laptop in suspend mode by:
$ sudo s2ram -f
And it works fine, but on resuming it remains blank and nothing happens. The laptop is on but the screen is off. I googled a lot but nothing does the job.