Suspend to disk: erratic behavior (openSuse 11.3)

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http://forums.opensuse.org – When the system tries to go to hibernate (suspend to disk), sometimes appears the suspension screen (green background with a bar decreasing), and then the user session come back without Internet connection and several services with unpredictable behavior. Other times, the system can suspend to disk normally, but when I try to start the system again, it hangs up with a black screen, like a console, saying "Looking for splash system...". Theses behaviors happen by clicking in Leave -> Hibernate or by means Power Management". Any idea? Thank you in (Distributions)