Problem solved! I update the bios to the latest version 601 (11/11/2010) and everything works fine now.
** Changed in: pm-utils (Ubuntu) Status: New => Fix Released -- shutdown and standby don't work for Kubuntu 10.10 64bits (motherboard INTEL DH57JG H57) https://bugs.launchpad.net/bugs/681987 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