Re: [2.6.22-rc3][ACPI?] Resume from s2r doesn't work.

Pavel Machek
2007-06-07T12:23:28Z

Hi!

> > Second, you can use PM_TRACE (Documentation/power/s2ram.txt) to find the
> > place where it really fails.
>
> First I augmented my minimal config kernel with some TRACE_RESUME()s:
>
> --- a/kernel/power/main.c 2007-05-27 23:48:05.000000000 +0200
> +++ b/kernel/power/main.c 2007-06-03 22:28:46.000000000 +0200
> @@ -223,6 +223,7 @@
> pr_debug("PM: Finishing wakeup.\n");
> suspend_finish(state);
> Unlock:
> + TRACE_RESUME(error);
> mutex_unlock(&pm_mutex);
> return error;
> }
> @@ -303,6 +304,7 @@
> error = enter_state(state);
> else
> error = -EINVAL;
> + TRACE_RESUME(error);
> return error ? error : n;
> }
...
> I got alternating
> hash matches drivers/base/power/resume.c:58
> and
> hash matches kernel/power/main.c:307
>
> > First, you can check if the patch
> >
> > http://www.sisk.pl/kernel/hibernation_and_suspend/2.6.22-rc3/patches/20-ACPI-preserve-the-ebx-value-in-acpi_copy_wakeup_routine.patch
>
> Then I applied this patch, but it doesn't change anything.
>
> But either way the script never reaches "shutdown -rn now". So, it
> seems, that my laptop does a full resume every other reboot, but it
> never returns to userspace.

But it returns to kernel... can you use more trace points to figure
out where it hangs?

--
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