Suspend doesn’t know its working

Often, when I have suspended by Zepto Znote 3215W, I get a little message at resume that suspend failed, which is weird as the laptop has just been suspended and successfully resumed.

Suspend failed message

It started with Linux 2.6.24.

Kernel 2.6.24 also seems to have broken some ACPI modules, as this now happens:

# acpi -V
No support for device type: battery
No support for device type: thermal
No support for device type: ac_adapter

I used to only get the error for “thermal” with kernel 2.6.23.

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One Response to “Suspend doesn’t know its working”

  1. rleon Says:

    Thanks for sharing this. It took me several hours to solve the problem to implement suspend on my Intel 965 desktop. I also found http://wiki.debian.org/Suspend very useful to understand the process.

    From what I have learned, HAL is the core of this process as it intercepts both ACPI and Gnome-Power-Manager events and then transfers the control to specific scripts that do the real job. Among the many scripts available, pm-utils are the recommended. So that HAL calls pm-suspend. Now, pm-suspend runs scripts to prepare for suspension and then either calls the kernel to suspend or calls another software that can handle specific instructions or quirks; this is the package uswsusp (userspace software suspend) that provides s2ram. This s2ram can be fed with instructions (quirks) from the pm-suspend defaults file (I used /usr/lib/pm-utils/defaults. Now, as from HAL 0.5.9, HAL can also pass the the options that pm-suspend will send to s2ram, if the hardware is recognized, in this case, I think, pm-tools default editing is not needed.

    In my case after verifying that suspend was successful with s2ram -f -a2, I edited /usr/lib/pm-utils/defaults to pass those parameters to s2ram. Then I verified that pm-suspend worked… checked Suspend from the Gnome applet and then from the power-off button. Finally, I could go to bed.

    However, I first tried to create /etc/pm/config.d/s2ram to pass the options but it didn’t work with pm-suspend as you described.

    Thanks.

    Ramon

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