I'm having what sounds to be the same problem. With a clean (Kubuntu) Edgy install, suspend/hibernate worked OK. After installing 'nvidia- glx', they don't work - suspend/hibernate appears to take place, but on resume the screen just stays blank and the system is unresponsive.
I'm using an NVidia GeForce4 MX 4000 AGP 8x (with 64Mb ram I think), on a machine with an AMD Athlon XP 1700+ and 1Gb ram. The motherboard is an Epox EP-8RGA with nVidia nForce 2 chipset. -- In Ubuntu 6.10 Edgy Eft: After install nvidia-glx and setup the system for the new driver, the Hibernate and Suspend don't resume video anymore with a nVidia GeForce 6200 AGP video card. https://launchpad.net/bugs/71839 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs