Volume keys

Technically speaking, controlling the TV's volume via CEC is possible. Sometimes, this also depends on the specific TV being used. But I'm not aware of the current KODI state regarding this: CEC volume control of TV and AVR

However, the most important requirement is: Does your PC have a functioning CEC adapter?

It seems that KODI is still hard coded to the AVR (audio system). So it requires the hacky way.

Create the python script "/storage/.kodi/userdata/keymaps/cec-volume.py".

#!/bin/env python3
import sys
import os
if __name__ == "__main__":
    key = sys.argv[1]
if key == "up":
    cmd = "cec-ctl -s --to 0 --user-control-pressed ui-cmd=0x41"
elif key == "down":
    cmd = "cec-ctl -s --to 0 --user-control-pressed ui-cmd=0x42"
elif key == "mute":
    cmd = "cec-ctl -s --to 0 --user-control-pressed ui-cmd=0x43"
os.system(cmd)

And additional the "/storage/.kodi/userdata/keymaps/keyboard.xml" to override the current action mapping of the volume keys of your keyboard.

<keymap>
  <global>
    <keyboard>
      <volume_down>RunScript(/storage/.kodi/userdata/keymaps/cec-volume.py, "down")</volume_down>
      <volume_up>RunScript(/storage/.kodi/userdata/keymaps/cec-volume.py, "up")</volume_up>
      <volume_mute>RunScript(/storage/.kodi/userdata/keymaps/cec-volume.py, "mute")</volume_mute>
    </keyboard>
  </global>
</keymap>

Works with a recent LE 13 nightly. That should work for you, too. But please keep in mind, that's only a workaround.

The correct implementation would be:

• That KODI dynamically switch between TV or AVR depending on the current state of CEC "System Audio Status".
• Only if CEC is disabled (or remote control routing explicit deactivated), the internal volume control of KODI should be used.