On 6/14/06, I. E. Smith-Heisters <public@xxxxxxxx> wrote:
Okay, looked at it some more. When RT is enabled, jack just locks up and the watchdog terminates the process, regardless of the buffer size. When RT is disabled the xruns are allowed to continue, and the number of xruns decreases with a higher buffer size (but never go below about 10/second). There's no evidence that RT mode has failed to be set. This is all as root. I am using the proprietary NVIDIA drivers, as gotten from the Ubuntu repositories. I would be surprised if this had anything to do with it though, since direct alsa works fine with the same xOrg drivers. Unless, of course, there's some software conflict between the video drivers and jack itself (as opposed to there being a hardware-level conflict).
It would not surprise me for the proprietary drivers to behave in a non-realtime-safe manner. This would affect JACK much worse than some heavily-buffered ALSA application. Can you try it with the open source driver to compare? -- joq
