Comment 151 for bug 578673

A SOLUTION that worked for me.

Dell E6410, Core i7, Nvidia NVS 3100M that would not resume from suspend or hibernate. Backlight comes on, but screen remains black when it comes out of suspend.

Tried a bunch of things, read a bunch of thread. This worked in one quick change.

- Edit /etc/default/grub from the command line via sudo
- Set the GRUB_CMDLINE_LINUX_DEFAULT variable as follows:

GRUB_CMDLINE_LINUX_DEFAULT="nouveau.modeset=0 acpi_sleep=nonvs"

- Run “sudo update-grub” at the command-line
- Restart Ubuntu

Solution credit is due to http://vxlabs.com/2010/11/30/ubuntu-10-10-x86_64-on-your-dell-e6410-with-nvs-3100m-gpu/

Also, I found that deactivating the Nvidia driver through System >> Administration >> Additional Drivers would also prevent the suspend problem. The instant I re-enabled the Nvidia driver it would not resume. The fix mentioned immediately above works with the Nvidia driver enabled too.