[PlanetCCRMA] FC2.1vP9 - jackstart just quits...

Fernando Pablo Lopez-Lezcano nando@ccrma.Stanford.EDU
Wed Sep 29 20:00:00 2004

On Wed, 2004-09-29 at 19:47, Mark Knecht wrote:
> Here's an interesting test. With Fernando's more recent PlanetEdge
> kernel, with is based and called .1vR9 I still do not receive
> interrupts from my sound card but Jack does not time out and die. It
> just sits there. So for fun I start up alsaplayer -o jack and to my
> surprise (sort of) alsaplayer starts and doesn't die. I insert Nora
> Jones and start alsaplayer playing the CD. Nothing happens. Then I
> start wiggling my mouse and Nora Jones starts playing perfectly. When
> I stop wiggling my mouse alsaplayer just keeps looping on a single
> frame, or group of frames. When I start wiggling the mouse again
> alsaplayer starts playing the CD again.
>    So, obviously, I just need to wiggle my mouse all night and I'm
> fine, right?!? ;-)

_I_ didn't say it :-)

I guess that is the answer. Most probably you can get some small battery
powered toy that can slowly move the mouse, just a tiny bit, so that
your hand does not tire. 

> It looks pretty clear that the system is not seeing interrupts from
> my sound card. I do a cat /proc/interrupts and with the mouse still
> the interrupt count doesn't increment.
>    I wonder how I go about working this out? Is it through Fernando?
> Some other path? this sort of thing, and how to communicate it to
> kernel developers, would be very far beyond my meager capabilities.

I'll see if I can forward your posts tomorrow to Ingo (who is brewing
the voluntary preemption patch). This is definitely a bug in the kernel.

-- Fernando