seem pulseaudio problem since

HDMI is plugged and ELD indicate  Samsung monitor


can you post output of

cat /proc/asound/card*/eld#*.0


control.23 {
                iface CARD
                name 'HDMI/DP,pcm=3 Jack'
                value true
                comment {
                        access read
                        type BOOLEAN
                        count 1
                }
        }
        
        control.28 {
                iface PCM
                device 3
                name ELD
                value 
'100008006712000100000000000000004c2dba0753414d53554e470907070000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
                comment {
                        access 'read volatile'
                        type BYTES
                        count 83
                }
        }

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https://bugs.launchpad.net/bugs/1309978

Title:
  [HP ProBook 4530s, Intel CougarPoint HDMI, Digital Out, HDMI] Sound
  plays through computer instead of tv

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