Re: DMA IRQ, or How To Prevent ipaq-sleep, From Suspending A Zaurus Playing Music

On 9/18/06, Francesco Marchetti-Stasi <[email protected]> wrote:
> Justin Patrin <[email protected]> wrote:
> >> > >
> >> > > Just set IRQ = 18 in /etc/ipaq-sleep.conf and it won't suspend
> >> while you
> >> > > play music.  I was only wanting to check whether there may be
> >> unwanted
> >> > > consequences...
> >> > >
> >> >
> >> > No, I got that part. It just seems strange to use the DMA interrupt
> >> > for this as DMA is used by other things, at least on a normal machine.
> >> >
> >>
> >> On my spitz /proc/interrupts shows 18 as pxa2xx-i2c. RP confirms that
> >> i2c is only for audio so using it for audio checking in ipaq-sleep
> >> should be fine. :-)
> >>
> >
> > Except it isn't...I set IRQ = 18 and started up ipaq-sleep and it
> > happily suspends my Zaurus after X minutes without regard to playing
> > audio. :-P
> >
>
> Yes, on my boxer pxa2xx-i2c is on IRQ 11, and I have exactly the same
> results: IRQ 11 does not work to rpevent suspending, IRQ 18 (DMA) does...
>

The DMA IRQ on my spitz is 25. I haven't tested it yet, but wouldn't
this cause the Z not to suspend any time, say, the HD is accessed? It
makes some sense to me to use this, but it could mena the Z never
suspends on its own...

Have either of you guys seen your Z auto-suspend after setting this
IRQ in ipaq-sleep.conf?

-- 
Justin Patrin

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