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SubjectRe: APM realy sucks on 2.6.x
Hi!

> >>I'm really willing to help the APM developers to track down this bug
> >>but don't have a clue how to debug this kind stuff.
> >
> >
> >What APM developers? There are none as far as I know.
>
>
> Hmmm ... So once again the Tooth Fairy and Santa Claus :-) ?
>
> At least a
>
> grep '<.*@' /usr/src/linux-2.6.6/arch/i386/kernel/apm.c | sed 's/.*<//' |
> sed 's/>.*//'
>
> gives me:
>
> <snip>
> Ulrich.Windl@rz.uni-regensburg.de
...
> chen@ctpa04.mit.edu
> </snip>
>
> This is pretty much for no one. And I guess you knew since you're on
> the list yourself. But I think you're right when meaning
> that there is not much of active maintenance anymore. Which at
> least I find a little bit discouraging when looking of the state
> of the ACPI support.

Yes, that's pretty much what I meant. ACPI has ~5 people actively
working on it, some of them probably full-time. That's a lot of
manpower, compared to APM.

And ACPI is in pretty good state, btw, unless you want
suspend-to-RAM. Unfortunately you want suspend-to-RAM.

> >Try removing calls to device_* in apm.c. Better yet become APM
> >developer.
>
> It seems like I'm on my way to do so (still reluctantly). As I stated
> in my previous mails I'm not born as a hardware/BIOS hacker (more the
> application C++/Java stuff) but I'm willing to learn. When I'm
> grown up I definitely want to be linux kernel hacker :-) ...
>
> Currently I ripped down the 2.6.6 kernel to almost nothing
> and add one module after the other checking for proper
> suspend/resume behavior....
>
> The most suspicious candidates on my list are currently the
> USB-UHCI driver and the ALSA sound system, which is my #1 candidate
> since it has not been an integral part of the 2.4.x (x<=20) kernels.
>
>
> So if anybody out there could give me guidance on how the apm code
> might interact with the ALSA sound system it would be highly
> appreciated....

device_suspend() will propagate all the way to alsa.
Pavel
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