To Jerome Lacoste: Note that there are clone() calls preceeding the sched_setscheduler(). It is possible that a child process is the doing something that causes the system to hang. However since you didn't run "strace" with "-f" switch (to also trace child processes), you only see trace of the parent process.
In other words, the trace that you lacks data about the children of the traced process, whose actions may be the actual cause, and because of not seeing the full trace, we attribute the problem to the sched_setscheduler(). On my system, skype always takes a long time to start (though I've never investigated this). But never did the box become frozen at that point. Only when there is some sound activity by skype (though not always) does the problem we are all concerned about appears. Perhaps you can try to generate a new trace with the "-f" switch ? -- BUG() report in getnstimeofday: soft lockup https://launchpad.net/bugs/53216 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
