As like Rinzwind said, i've fix 90% of error names after find original charset: sudo convmv -f iso-8859-1 -t utf-8 -r /media/disk/*
Surprisingly, after running the program pavucontrol, HDMI sound card is permanently seen. Sound works fine now.
I fix it with distribution upgrade into 16.04 (How can I upgrade Ubuntu LTS to the next one offline?). WAN and LAN works with new version.