I can reproduce it easily with Ubuntu 13.04 (raring) with kernel 3.8.0-29-generic.
To make clarify what happens: There are 4 ways to get the current speaker mute status: 1. The mute led on the physical mute button. 2. The /proc/acpi/ibm/volume file 3. The icon (I'm currently using gnome-shell) 4. The PulseAudio Volume Control To mute/unmute there are 3 methods: a. The hardware mute button for the speaker. b. The slider for the volume icon in gnome-shell c. PulseAudio Volume Control If I use method a then all four statuses remain in sync. If I use method b or c to mute then 1 and 2 don't change. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/788540 Title: [Thinkpad T410s] Mute indicator gets out of sync Status in “linux” package in Ubuntu: Incomplete Bug description: The Thinkpad T410s has an indicator led on the mute button and one on the microphone mute button. If I only use the hardware mute key everything works fine, but when I use indicator-sound or pavucontrol the LED won't switch off and the indicator gets out of sync. Mute in /proc/acpi/ibm/volume follows the hardware key and also doesn't switch when I use pavucotrol or indicator-sound. Version: Ubuntu 2.6.38-9.43-generic 2.6.38.4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/788540/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp