I had the same problem. Setting SAVE_VBE_STATE and POST_VIDEO to false solved the problem - although I need to switch to a console (Shift- Ctrl-F1) and back (Ctrl-7) to get the display.
See also: https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/34043 -- With nVidia GeForce 6200 AGP, Ubuntu 6.10, nvidia-glx, Hibernate and Suspend fail https://bugs.launchpad.net/bugs/71839 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
