This might be a duplicate of bug 66982.... https://launchpad.net/distros/ubuntu/+source/arts/+bug/66982
If so, a solution was already provided , thanks to Daniel T Chen echo "options snd-via82xx dxs_support=2" | sudo tee -a /etc/modprobe.d /alsa-base and reboot! -- aRTS uses 100% CPU and freezes whole computer on KDE startup https://launchpad.net/bugs/70083 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs