Where can I find a list of compatible audio cards?
Maybe the hardware compatibility list on linuxcompatible.org can help you.
Maybe this can help too: Sound Cards & Drivers - linux-sound.org
Here is another list: Sound cards - Linux Hardware Compatibility HOWTO
For Ubuntu specifically, see HardwareSupport/Components/SoundCards on the wiki.
You can find a list of certified audio cards in the component certification catalog.
- Component Catalog