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    SubjectRe: S3 test tool (was : Re: Bizarre oops after suspend to RAM (was: Re: [ACPI] Resume from Suspend to RAM))
    Date
    Pavel Machek <pavel@suse.cz> writes:

    > Hi!
    >
    >> >> > You got this wrong. It is three illegal instructions but
    >> >> > *nested*. Like error, error in fault handler, error in doublefault
    >> >> > handler.
    >> >>
    >> >> Ah. Yeah, this isn't an area I know much about :) Thanks for the
    >> >> correction.
    >> >>
    >> >> > Try replacing flags manipulation with any stack manipulation to see
    >> >> > what is wrong.
    >> >>
    >> >> Do you mean try something like this? Replace the push 0 with push
    >> >> 0x1234 ; push 0x1234 ; pop ; pop and try to figure out which line
    >> >> causes the reboot?
    >> >
    >> > Yep, try pushl $0, popl %eax; if that causes problems, something is
    >> > seriously wrong with stack, otherwise changing flags hurts.
    >>
    >> pushl $0, popl %eax gets the reboot. So it's changing the flags that
    >> is bad?
    >>
    >> What should we try next?
    >
    > ??? You wanted it to reboot? If not, something is wrong with
    > stack. Not sure whats next.

    I don't want it to reboot, I guess I got confused. As you say, maybe
    something is wrong with the stack. It's weird that something would be
    wrong with the stack, because the other test to check the
    suspend/resume code path works like a charm, the machine will do the
    fake suspend/resume just fine.

    So the bios must be messing up the stack right? Is there a way to
    examine or dump the stack so that we can compare the stack when
    windows does the suspend/resume compared to when linux does it?

    thanks,
    Jason

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