In case anyone else finds this bug before a solution, I believe it's possible to turn down or mute the volume on the greeter screen and the setting will be persistent. There was a bug with this but it's reported fixed.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-greeter in Ubuntu. https://bugs.launchpad.net/bugs/949782 Title: No way to disable start-up sound using GUI Status in Unity Greeter: Fix Released Status in “unity-control-center” package in Ubuntu: Triaged Status in “unity-greeter” package in Ubuntu: Fix Released Status in “unity-control-center” source package in Precise: Won't Fix Status in “unity-greeter” source package in Precise: Fix Released Bug description: There doesn't appear to be a way to disable the start-up sound when Unity Greeter first loads. To manage notifications about this bug go to: https://bugs.launchpad.net/unity-greeter/+bug/949782/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
