You need root privilege to debug
sudo echo 11 > /proc/asound/card0/pcm0p/xrun_debug
___________________________________________________________ $ sudo echo 11 > /proc/asound/card0/pcm0p/xrun_debug ___________________________________________________________
implies: ___________________________________________________________ # echo 11 > /proc/asound/card0/pcm0p/xrun_debug ___________________________________________________________
So I did have root priviledges when I executed that command, and it still gives me a Permission denied error.
I tried the command under root and it accepted the command but didn't print anything after issuing the command. So I guess it worked?
Check the system log , you should find the hwptr change at 10ms interval if vlc use period time of 10ms
Again, what system log? Be a little bit more specific please.
Try different period time/size to verify that the hardware really support any arbitrary period time/size requested by the application ?
VLC doesn't have any options or terminal parameters to be able to change the period as you mention.