no sound through hdmi when setting mode using xrandr
System info: Kubuntu 22.04 running on NUC7PJYH2 connected to Samsung 65QN90B (for display as well as sound through HDMI). output of xdpyinfo output of xrandr --verbose
When I switch to 1920x1080 using xrandr, I consistently get no sound through the HDMI connection, using the following commands.
xrandr --output HDMI-1 --mode 1920x1080
or
xrandr --output HDMI-1 --mode 1920x1080 --set audio on
KDE shows sound is produced (in the volume widget), but there's no sound. uppon returning to the previous resolution, using the command
xrandr --output HDMI-1 --mode 3840x2160
Sound works again.
Changing the resolution using the display settings window in KDE works without affecting the sound.