enable the bionic-proposed repository sudo apt-get update sudo apt install linux-image-unsigned-4.15.0-44-generic sudo apt install linux-modules-4.15.0-44-generic sudo apt install linux-modules-extra-4.15.0-44-generic sudo apt install libasound2 (updated to 1.1.3-5ubuntu0.2)
Then reboot and plug the dock to a Dell laptop through TB bus, open the gnome-control-center and select the sound, we can see the USB headphone and USB Lineout from output device tab and USB Mic from input device tab. And both USB output and input work well. Then change verification-needed-bionic to verification-done-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to alsa-lib in Ubuntu. https://bugs.launchpad.net/bugs/1806532 Title: The line-out on the Dell Dock station can't work Status in HWE Next: New Status in alsa-lib package in Ubuntu: Fix Released Status in linux package in Ubuntu: Fix Committed Status in linux-oem package in Ubuntu: Fix Released Status in alsa-lib source package in Bionic: Incomplete Status in linux source package in Bionic: Fix Committed Status in linux-oem source package in Bionic: New Status in alsa-lib source package in Cosmic: Fix Released Status in linux source package in Cosmic: Fix Committed Status in linux-oem source package in Cosmic: New Bug description: [Impact] On the Dell thunderbolt docs stations (WD15 and WD19), there are two playback devices, one is headphone, the other is line-out, but there is no UCM for these docks yet, so the pluseaudio only can handle the 1st playback device, need us to add the UCM for them, before adding UCM, we need to set the longname of the sound card in the linux kernel. [Fix] For Linux kernel: Cherry-picked 3 upstream patches, these patches add the longname of the sound card for the dock station. For alsa-lib: Cherry-picked 3 upstream patches from alsa-lib, these will add ucm configuration files for Dell WD15&19, and change the SPDIF conf in the USB-AUDIO.conf. [Test Case] Open the gnome-sound-setting, we can choose headphone-usb and lineout-usb from UI, and play sound via these devices [Regression Potential] Very low, these patches come from upstream, and the change is only specific to WD15 and WD19 dock station. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1806532/+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
