Question: I am running Kubuntu 19.04 on a XPS 13 9380 with the TB16 thunderbolt dock. 

Everything was running fine and I could get audio from the dock headphone jack. After upgrading from FW 1.7.0 to 1.8.0, the audio device from the dock still show as USB Audio headphone and USB audio line out. no sound comes out of the devices. 

When looking at the advance audio setting, i noticed that the only profile available for USB audio is Default. 

any help would be greatly appreciated.

Answer: 
I was able to fix it by installing Ubuntu 19.10 on a different partition, which then - during it's installation - did repair and update the grub.
You chose not to let `boot-repair` fix your boot. If you do choose to let `boot-repair` make changes it will do this:

```
=================== Suggested repair
The default repair of the Boot-Repair utility would reinstall the grub-efi-amd64-signed of nvme0n1p7, using the following options:       nvme0n1p1/boot/efi,
Additional repair would be performed: unhide-bootmenu-10s   fix-windows-boot use-standard-efi-file

=================== Blockers in case of suggested repair
Please use this software in a live-session (live-CD or live-USB). This will enable this feature.

=================== Final advice in case of suggested repair
Please do not forget to make your BIOS boot on nvme0n1p1/efi/.../grub*.efi file!

If your computer reboots directly into Windows, try to change the boot order in your BIOS.
If your BIOS does not allow to change the boot order, change the default boot entry of the Windows bootloader.
For example you can boot into Windows, then type the following command in an admin command prompt:
bcdedit /set {bootmgr} path \EFI\...\grub*.efi

=================== User settings
The settings chosen by the user will not act on the boot.

```