Thank you for your reply
I have applied the latest driver (Win64_15338)
However, there was no change
I think cable is too long.
but, I have a layout constraints, I must in this way...
If I shorten the cable(1: 10m->3m), the problem does not occur.
So, I think also that there is no problem with the Intel driver.
However, the cable is long(1: 10m), the problem does not occur in Ubuntu
Therefore, I do not think also that there is a problem with the cable length.
because under the same conditions (PC, Cables, Adapters, TV), there is a difference in the Ubuntu and Windows.
As a minimum requirement, which appears as a Sound Playback Device, I think that the audio support is shown in the EDID.
is there any other conditions ?
thanks