I have a Lenovo Thinkpad x240 with Dockingstation. I have the same problem described below.
installed --> Kubuntu 14.04 LTS The headphone jack on notebook works fine, but there is no sound on the headphone jack on docking station. ** Attachment added: "lspci_nv.txt" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/157313/+attachment/4092636/+files/lspci_nv.txt ** Changed in: linux (Ubuntu) Status: Expired => New -- 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/157313 Title: The headphone jack in the docking station doesn't work Status in “alsa-driver” package in Ubuntu: Won't Fix Status in “linux” package in Ubuntu: New Status in “linux-source-2.6.22” package in Ubuntu: Won't Fix Bug description: I use a laptop (Dell D610) at office which is normally docked to the docking station. The external monitor, ethernet cable, etc. are connected through this docking station. Everything else works perfectly (USB connectors,etc.) but the headphone jack doesn't work. I've tested it on windows and works fine. When i connect the earphones to the jack, the laptop (on-board) speaker gets muted (like you'd expect), but can't hear anything through the headphone also. This problem has been there since Dapper and now I'm using Gutsy. My old bug report got expired, so opening a new one. https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/55150 Thanks, -vikas To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/157313/+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