Ubuntu and laptop w/ external monitor

[suemac at empire.net]

Hi All,

I have done extensive testing with UBStudio 8.04 on a Dell XPS1530 laptop
(nvidia) with a monitor plugged into the VGA port.

The test was done with:

- FFADO
- qjackctl
- Ardour
- 2 Audiofire12's
- Ardour recording 24 channels

Different test configs:

1. laptop screen only
2. external screen only
3. desktop spread across both laptop and external monitor

Results:
- config #1 can record for long periods (1 hour +) with no xruns.
- config #2, & #3 rarely go more than 30 minutes without xruns.

#2 & #3 improve if the jack priority is max'ed to 89, but the display
update response suffers drastically.

This is using the free nvidia drivers.

I suspect this is an nvidia driver or X issue.

Any thoughts to address this are welcome.

Regards,
Mac

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