Hi :
I'd to like know onkyo se-300-pcie can work on linux or not.
maybe you can try this page
https://www.alsa-project.org/wiki/Matrix:Module-ice1724
it's base on onkyo se-200
according this page
https://forums.linuxmint.com/viewtopic.php?t=183576
seems it can detect correctly under linux
maybe you should try se-300-pcie on new version of ubuntu
and I saw you spoken Chineses, then here is Chinese for you:
我也有興趣了解 onkyo se-300pcie 能否在 linux 底下運作
你可看看上面我所提到的2個網址
然後你可試試新版的 ubuntu ,也許在上面不需太多設定就可正常運作。
若還不行,看你是否願意將這塊卡借我幫你測試看看,願意的話,就發私訊給我吧。