Re: [jornada] sound debugged

Hi,

did you boot the new kernel? I am having problems with the 2.6 kernel with
linexec as well as hpcboot - linexec crashes, hocboot complains it can't jump
to kernel. Tried this with kernels from Alex's JFFS2 images as well as with a
custom-built one.
Maybe different boot/bootloader architecture in the new kernel? I'd like to
look into linexec but I have 4 exams coming up, so there's absolutely no time
(and I may lack the skills as well).

Regarding suspend/resume, what I would've liked to try would be to let the
kernel write all memory and video mem to CF-card, suspend the processor and
then let WinCE boot. Then run a patched linexec that would load that memory
image and jump to the kernel again - could work if WinCE is not messing too
much with registers/devices/... . But there's that skills and time problem
again :)

If the 2.6 kernel ran along with Opie on the Jornada I'd personally almost see
it as the perfect PDA :)

Bye,
Lorant

> So basically I can play sound fine until I try to suspend without a
> flashboard.
>
> In some of the 2.4 kernels somebody implemented a hack to turn off the
> display, it would be nice if the same option where available in 2.6
> kernels for non-flashboard users (which I presume are the
> majority??????????).
>
> I'm wondering if it isn't possible to further improve the battery life
> by having some kind of suspend script which just sends a SIGSTOP to most
> of the processes (e.g. everything but the kernel and something to allow
> everything else to resume). Then upon resume a SIGCONT is sent to all
> the processes to bring them back to life again.
>
> I don't know how much effect this would have, but i'm sure battery
> consumption is lower with no processes running as the kernel should
> issuing lots of HALT instructions during the idle time, so the CPU will
> draw less power.
>
> Is it possible to tell the PCMCIA controllers to sleep and resume
> without having to power off the rest of the system?
>
> If I can make the jornada last the length of my working day on a single
> battery charge then it makes it pretty much as usable as CE.
>
> alexgrosy_at_t-online.de wrote:
> >Hi,
> >
> >of course, the sound chip will also work without a flash board. It's just
> >suspend/resume that is dependant on one of these boards (as a bootloader
> > is required to resume device). When the device is suspended the CPU is
> > completely reset and without a bootloader wince would just start booting
> > when trying to resume without a bootloader.
> >
> >kind regards,
> >alex
> >
> >On Sunday 13 February 2005 17:14, Colin Sauze wrote:
> >>alexgrosy_at_t-online.de wrote:
> >>>Hi,
> >>>
> >>>I have now debugged the sound on the Jornada 720 (kernel 2.6). It is now
> >>> a fully featured linux device if you have a flash board (sorry guys, I
> >>> can't get you any of them)
> >>
> >>Why does it only work with a flashboard? I don't see how the flash board
> >>alters your ability to address the sound chip?
> >>
> >>
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>
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Received on Mon Feb 14 2005 - 13:06:33 EST