Re: [PATCH] Dynamic tick, version 050127-1

[Pavel Machek <pavel@suse.cz>]

Hi!

> > I used your config advices from second mail, still it does not work as
> > expected: system gets "too sleepy". Like it takes a nap during boot
> > after "dyn-tick: Maximum ticks to skip limited to 1339", and key is
> > needed to make it continue boot. Then cursor stops blinking and
> > machine is hung at random intervals during use, key is enough to awake
> > it.
> 
> Hmmm, that sounds like the local APIC does not wake up the PIT
> interrupt properly after sleep. Hitting the keys causes the timer
> interrupt to get called, and that explains why it keeps running. But
> the timer ticks are not happening as they should for some reason.
> This should not happen (tm)...

:-). Any ideas how to debug it? Previous version of patch seemed to work better...

> I've noticed that the only machine I have with ACPI C2/C3 support
> does not do anything in the C2/C3 loops, it just spins around and
> consumes more power than in C1 with hlt!
> 
> That's because we currently don't have any code to enable the C2/C3
> states in the southbridges on many Athlon boards. It's the same
> problem on my Crusoe laptop ALi 1533 chipset.

I do not think we should need any chipset-specific code. ACPI
is expected to solve it... Can you ask on acpi-devel?

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