[LAU] trial and error
matt at smiffytech.com
Mon Aug 18 16:47:21 EDT 2008
Quoth Hamish Low at 2008-08-19 05:54...
> Still I have problems, partly I guess because I'm not a techie, but I've
> been stubborn enough to keep trying all this time. Anyway the point I'm
> at now is that I can boot up into the realtime kernel - I need to go
> into a failsafe gnome session as then flgrx doesn't start up (it's
> really greedy with processing power, but when I'm not making audio it is
> very useful and looks great), and compiz-switch only turns off the
> effects, it doesn't free up the processor.
'Fraid I can only answer one part of that - I can tell you that the
fglrx module is NOT compatible with RT kernels. Taking it out of the
equation also appears to free up an interrupt.
In a realtime system, you really want to strive for minimalism in all
the non-audio parts of the system - NO fancy visual effects or anything
like that. If you get rid of anything that takes CPU time but is not
essential to your operation, you are less likely to start falling foul
of the dreaded Jack xruns.
At the moment, I am dual-booting my system between realtime and
non-realtime kernels. This allows me to have a totally different set of
runlevels for audio work, disabling the onboard sound card, wireless
networking and a load of other bits and pieces that I use for my work
(Apache, MySQL, etc). Taking these bits that are not required for audio
work makes a huge difference, especially the on-board sound which was
causing most of the xrun problems.
Hope you get working soon!
Smiffytech - Technology Consulting & Web Application Development
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