On Fri, 18 May 2007 23:37:01 +0200
Christian Leber <[email protected]> wrote:
> Hello,
>
> i hit a problem with suspend to ram and especially resume.
> Hardware: Dell Latitude D810 (some Intel 915 with Intel Pentium M)
>
> With 2.6.19.7 suspend to ram works reliable, but with 2.6.20-rc4
> it stopped working reliable.
argh, that sounds like an ACPI regression.
> I still can suspend, but after the first resume it goes back to sleep
> directly again, when resuming again it works.
> After the second suspend it won't resume at all.
>
> The problem is that i can't try out the kernel versions <rc4, because
> rc1, rc2 and rc3 doesn't boot at all, so git-bisect also won't help.
>
> Has somebody an idea what i could try out?
>
> (the distribution is in this case ubuntu feisty)
>
The fact that bisection broke really does make it hard. What you would
need to do is to find the patch which fixed that doesn't-boot problem, then
reapply it each time you perform an iteration. That's all doable, if you
have the time. Use git-bisect for it.
Have you tested 2.6.21 and/or 2.6.22-rc1?
We had one other report earlier today that 2.6.22-rc1 does an immediate
resume after suspend-to-RAM - perhaps that is related.
Of course the alternative way of debugging this is just to debug it, rather
than the difficult bisecting. Perhaps an ACPI developer can help with
that.
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