[ACPI] Compaq presario 2556EU

[Hein-Pieter v. B. <hp...@sy...>]

hey all!

I've been playing around trying to get S1/S3 state to work on my laptop, but 
so far I've been unsuccesful.

Well first of all: the hardware :) attached is the output of lspci -vv, I've 
got the latest BIOS rev for the machine. Beware: this thing has an ATI 
IGP340M video card, I know that's a whole problem all by himself :)

well, S1 state:
if I echo -n standby > /sys/power/state I get a message in syslog:
PM: Preparing system for suspend
Stopping tasks: 
=============================================================================|
Restarting tasks... done

which is OK I guess, but it never actually goes to standby (or only for half a 
second, depending on your point of view I guess :)) I haven't been able to 
change this behaviour, booting in single-user mode, or anything doesn't 
change this??

S3 state:
I've tried to do everything I could find on the mailing lists, in 
Documentation/power/tricks.txt and Documentation/power/video.txt.
I've tried this with kernel versions 2.6.7 and 2.6.8.1 with and without the 
acpi patches from acpi.sf.net, doesn't make a lick of difference.
I've also tried with acpi=noirc pci=noacpi acpi_sleep=s3_mode 
acpi_sleep=s3_bios (and all possible combinations of those) tried various 
apic settings off,on and whatever I could find in kernel-parameters.txt
with or without device drivers loaded, with a kernel whith no hardware support 
other than what's needed to get the thing booting (+acpi) in single user mode 
and with init=/bin/bash 

Well, suspending seems to go fine, but the resuming is where things start to 
go wrong :) the system enters the state in a normal way, stopping tasks, 
entering state etc. and the power led starts to glow (or blink what you want 
to call it)

As soon as I press the power button again, the power led lights up again, and 
the led behind my power button lights up again to, my keyboard leds flash, 
and I get a second or something of HDD activity. After that, nothing. My 
keyboard leds (IE capslock) won't work anymore, and I can't get any hdd 
activity (I tried typing in hdparm -t /dev/hda to get some) 
I've got no networking (if I enable that, which doesn't seem to matter for the 
overall effect) 

The thing's a brick basically :)

I've also tried the following advanced script :)
#!/bin/bash
echo mem > /sys/power/state
touch isitworking

well, no "isitworking"

One other weird thing I noticed is that as soon as I press the power button 
and keep hitting the capslock key frantically it keeps responding for about 5 
seconds until it's stuck in the state that it's in (ie if it crashes with the 
caps lock led on, it stays on, and vice versa)

well, that's all the information I can give you at the moment, because I don't 
have a serial port on this thing :( so I can't have a serial console to debug 
the thing.

if there's more info I can give you do tell :)

thanks in advance!

-Hein-Pieter van Braam