Low volume output on Realtek ACL897 card

Hello,

I spent some hours trying to find a solution but apparently there is none. =
Some mini PC models from Beelink (for sure model SER6 and SER7, possibly ot=
hers) have extremely low signal output from the Realtek ACL897 sound card w=
ith standard intel-hda driver, making the audio outputs unusable on Linux. =
This is also true on a fresh Windows install, unless a driver is installed =
from the Beelink website.
I would like to understand if this is a common issue affecting all ACL897 c=
ards or if this is related to the specific implementation on these PCs. In =
case this is instead a problem specific to Beelink units, is there any hope=
 to reverse engineer a fix without support from the manufacturer=A0(which i=
ndeed doesn't seem much concerned by the issue) or should I just give up?

Thanks for your feedback,

Marco Asa