No, that bug says that the speakers aren't muted when headphones are plugged in directly to the laptop.
This one says that the port replicator headphone jack doesn't work. Also, the laptop model is completely different. -- Dell C510 port replicator headphone jack https://launchpad.net/bugs/37409 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
