standby resumes immediately in 2.6.0-test8

Hi,

I am trying to get "standby" to work on my Sony vaio laptop. I did:
echo -n "standby" > /sys/power/state

But this only flashes the screen once (in X this is more noticeable) and resumes immediately.
Dmesg shows:

PM: Preparing system for suspend
Stopping tasks:
============================================================================| Restarting tasks... done

I am using 2.6.0-test8 with suspend and sleep states enabled. All other ACPI functions seems to work fine, my laptop is an R505DL.

How can I debug this?

- Aviram

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You might try

sleep 1; echo -n "standby" > /sys/power/state

I have the feeling that the "release key" event othe return key wakes the computer up. With the sleep 1; the "release key" event occurs while the computer is not yet suspended.

That might be considered a bug, by the way.

Éric Brunet

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I tried it, but that didn't help. I even booted with init=/bin/sh to make sure nothing is running (and no modules are loaded) and tried the line above - again the resume was immediate.

It *does* look like something wakes the computer up immediately - but what can it be?

- Aviram

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Could you please do

# echo -n standby > /sys/power/state
# echo $?

and report whether that says '0' or '1'?

Also, please send the output of 'cat /proc/acpi/sleep' ? If "S1" is not present, then your system does not support standby, and it will not work. Otherwise, we truly do have a bug..

Thanks,

Pat

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# echo -n standby > /sys/power/state
# echo $?
1

# cat /proc/acpi/sleep
S0 S3 S4 S5

I guess not :-(

For the record, it's a Sony Vaio R505DL.

- Aviram

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Is there a certain reason why

# echo standby > /sys/power/state

(also without -n) is not accepted by the code?

Regards,

Bas.

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It's just pedantic about the parsing, which saves a couple of lines of code. If it's too inconvenient, please use a script to mask it. :)

Pat

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