I have the same problem after installing Trusty. This worked perfectly in Saucy, not sure what's causing this.
I'll provide any log / information you want, just ask right away. I'm running Ubuntu 14.04 64bit, Hardware information: Processor: Intel® Core™ i3 CPU 540 @ 3.07GHz × 4 Graphics: GeForce GTX 550 Ti/PCIe/SSE2 using properietary drivers (nvidia-331.38 tested) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1323871 Title: Lag when adjusting sound To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1323871/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs