I ran into a very similar behavior as well. There is an ongoing discussion at ubuntuforums where I posted some info but I think it is better suited here. Here is the thread:
http://ubuntuforums.org/showthread.php?t=2159402 So this is on Ubuntu 13.10 with znes package version 1.510+bz2-5ubuntu3. Very similar behavior -- the application stops responding to input after 30 minutes or so and can only be SIGKILL'd. I ran strace on the hung process and it appeared to be stuck in a futex-based deadlock: futex(0x9851848, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x9851848, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x9851848, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) futex(0x9851848, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x9851848, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x9851848, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1214241 Title: Freezes in midgame To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zsnes/+bug/1214241/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
