I have installed Ubuntu 9.10 over Debian 5.0. Today I have tried with Ubuntu 9.04 and had the same issue, so I become convinced that this was not a problem with Ubuntu, but with my ACPI configuration (which is anyway the default Ubuntu one).
I have found a solution on this site: http://www.amitsrivastava.net/2008-03-23-hibernate-suspend-resolved-ubuntu-gutsy-nvidia-dell-vostro/ following the instruction of this site I have managed to hybernate and resume my PC succesfully. -- [Acer, inc. Aspire 5920G] hibernate/resume failure [non-free: nvidia] https://bugs.launchpad.net/bugs/449071 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs