[xwax-devel] Realtime Q

[Marc P. <mar...@gm...>]

So after a crazy year I finally unpacked all my records and gear, set
up my DJ equipment, upgraded to xwax 0.4, and now I'm running into
something funny - when I boot to the realtime kernel, either things
don't start or they slow to a crawl.

Previously my laptop was running Ubuntu Gutsy and the RT kernel and
everything ran fine. Over the summer I upgraded to Hardy and now when
I boot to the RT kernel sometimes Gnome doesn't start. Other times it
will start, and if I play a sound file using aplay or rhythmbox, the
sound is drawn out like it's being timestretched. What's even weirder
is if I'm playing a song in rhythmbox it will be slow, but if I
distract the computer by moving my mouse around in circles then it
speeds up towards normal pitch. Other times (there's no discernible
pattern) trying to run aplay or alsamixer, the terminal just hangs.
Same with xwax, sometimes it hangs at "initializing deck 1", sometimes
it starts the GUI  and loads tracks, but doesn't get any input from my
Scratchamp.

If I boot to the standard kernel, everything runs fine including xwax,
other than the occasional xrun. But crap, I had it working before...

So does anyone have any idea what's going on? Googling draws a big
blank for me. I've tried playing with rtprio and nice parameters, and
I have memlock set to half of my memory (256 of 512 MB). I've tried
the 2.6.24.22 and .21 RT kernels. I've tried running xwax as sudo.
I've tried the nohz=off boot parameter. I'm not sure what to try next.

Thanks for any wisdom you can provide,

Marc