Re: ACPI issues - suspend-to-ram and processor speed

[Pavel Machek <pavel-AlSwsSmVLrQ@public.gmane.org>]

Hi!

Can you get any data out of notebook? Like 8 leds on paralel port, pci
card decoding port 0x80 etc? [That's where soldering iron might be usefull].

> Stupid question of the evening:
> 
> It's 5am here and I've just spent about the whole night playing witch ACPI, 
> DSDTs etc...
> 
> The notebook I have can only resume from standby by pressing the power button. 
> Could it be, that when the power button is pressed, the system starts to wake 
> up, but the "power button event" is not intercepted by ACPI and passes 
> through to "the hardware", causing the notebook to shut down for
> good?

Improbable.

> I know thats in very rough laymans terms, but I hope it's enough for you guys 
> to tell me just how wrong I am ;).
> 
> Here's a rought flowchart of what's happening on my notebook (afer 6. is the 
> problem):
> 
> 1. echo 3 > proc/acpi/sleep
> 2. PM: Preparing system for suspend
> 3. Stopping tasks: ==================|
> 
> 4. --> Notebook enters standby. HD quiet, LCD off, fans off, On/Off LED pulses 
> slowly
> 
> 5. Press power button to wake notebok
> 
> 6. --> Notebook tries to leave standby. HD spins up, LCD light on but no text, 
> fans start...
> 7. --> Not even 1/2 second later, all off. Notebook is off. On/Off
> LED off

Easy. Insert infinite loop at begining of wakeup_start. If it hangs,
you know it reached wakeup_start, and fix wakeup code. If it does not,
we left hardware at "bad" (i.e. bios did not like it) state before
suspend, fix suspend code. (Turn off APIC etc). [This is where your
assembly skills come handy.]

> 8. Press power button again.
> 9. --> Normal boot...
> 
> Could it be that there's some magic power-off event queued up when you press 
> the button?

If ACPI event was queued, it would do clean shutdown; you'd notice
that.
								Pavel
PS: When stuck, try asking your black cat :-).

-- 
934a471f20d6580d5aad759bf0d97ddc


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