i suspect your graphics device is having a hell of a party :)
that or jackd has not given enough real-time priority--as a rule of thumb, it should be one tick below of the target sound device and above the one of i8042 (pc-keyboard, ps/2 mouse); if your mouse is a usb one then maybe you'll have to tweak that RTIRQ_NAME_LIST again and either get rid of the "usb" particle over there or include only the usb ports (eg. "usb1", "usb2", etc.) where potential rather interesting devices are connected (eg. an usb sound device).
i suspect your graphics device is having a hell of a party :)
that or jackd has not given enough real-time priority--as a rule of thumb, it should be one tick below of the target sound device and above the one of i8042 (pc-keyboard, ps/2 mouse); if your mouse is a usb one then maybe you'll have to tweak that RTIRQ_NAME_LIST again and either get rid of the "usb" particle over there or include only the usb ports (eg. "usb1", "usb2", etc.) where potential rather interesting devices are connected (eg. an usb sound device).
hth.
cheers