[LAU] real time audio and graphic/ interrupt tweaks?

Arnold Krille arnold at arnoldarts.de
Mon Jul 27 03:45:26 EDT 2009

On Monday 27 July 2009 01:36:57 Martin Horn wrote:
> I try to run xwax on ubuntustudio 8.10 on a Panasonic CF-T2 subnotebook
> (1Ghz/512MB). Everytime I start real time audio apps like jack the graphic
> gets very slow and freezes for some seconds, also the audio playback is
> like timestretched and sounds filtered.
> I guess it has something to do with interrupts shared by graphic and sound
> (sound comes from a Maya44 USB sound card).
> Can anybody give me a hint how to check or alter interrupt settings or do
> you have any other ideas...?!

Most computers have more then one usb port. And these usb ports sit on 
different irq's, I doubt it that all of them are shared with the graphics.

How do you know which usb port uses which irq?
Check the output of "lsusb" and "cat /proc/interrupts" to see where you audio-
device is connected and which irq that port has.

Have fun,


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