ACPI suspend weirdness on Dell Inspiron 2650

[Luke Hammer <lukeh-rdE3vRTOlSC6c6uEtOJ/EA@public.gmane.org>]

Hi,

I've finallyjust managed to get some kind of suspend state
working on my Dell Inspiron 2650 laptop, using the 2.4.21-pre3 kernel
and the ACPI-20030125-2.4.21-pre3 patch (under RedHat 7.3). I can
get some kind of suspend state working using 'echo 1 >/proc/acpi/sleep'
but I don't think it's the genuine suspend-to-RAM state. For one
thing, as soon as I put it into this state, one of the fans comes on
and stays on (not very good when you're trying to conserve battery
juice, but this is probably a Dell BIOS problem); and secondly, the screen
doesn't actually seem to be turned off - I can still make out an image 
on it,
it just looks like the backlighting has been turned off.

Nothing at all seems to happen if I try to echo 3, 4, 4b or 5 to 
/proc/acpi/sleep,
which is strange since the ChangeLog for the latest ACPI patch mentions
being able to change settings for the S3 suspend, and it also claims to
incorporate the s4bios patch. If I cat /proc/acpi/sleep I get "S0 S1 S3 
S4 S5", so
I'm not sure if I'm doing something wrong, or if ACPI suspend-to-RAM support
isn't fully functional yet.

So I'm wondering if anyone can give me any hints about getting these
real suspend states to work? Any information would be much appreciated.

-Luke




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