Edit .bashrc (/home/pi/.bashrc)
sudo nano /home/pi/.bashrc
at the last line add this:
/usr/bin/amixer -c 2 sset "Headphone" 100%
then reboot, it works for me here
Edit .bashrc (/home/pi/.bashrc)
sudo nano /home/pi/.bashrc
at the last line add this:
/usr/bin/amixer -c 2 sset "Headphone" 100%
then reboot, it works for me here