On Wed, 1 Nov 2006, Adrian Bunk wrote:
>
> Subject : Thinkpad R50p: boot fail with (lapic && on_battery)
> References : http://lkml.org/lkml/2006/10/31/333
> Submitter : Ernst Herzberg <[email protected]>
> Status : submitter was asked to bisect
>
> It seems to be completely unrelated (except that it's also a ThinkPad),
> but it might be worth a try whether a (non-SMP) kernel without APIC
> support fixes the issues after resume.
>
> Hugh, your laptop seems to be a non-SMP laptop.
That's right.
> Do you have APIC enabled, and if yes does disabling help?
Yes, I do. But I've just tried booting with "noapic" and with "nolapic"
and with "noapic nolapic", but none of those make any difference.
(That is, they make no difference to the FnF4-ineffective-after-resume
behaviour that I'm finding fairly easy to reproduce at will today on
2.6.19-rc4; whereas yesterday it was seeming to me that -rc4 was much
better than -rc3 in this regard. Something I have learnt today is that
the key is ineffective "for a while", but may become effective later.
It's conceivable that the behaviour I'm reproducing today is not quite
the same as what I was experiencing earlier with real-life suspends.)
More to the point, with great hope in my heart, I've tried backing
out Andi's git-cf4c6a2f27f5db810b69dcb1da7f194489e8ff88.patch
to arch/i386/kernel/io_apic.c, the one which Michael and Linus have
homed in on. But sadly that makes no difference for me: I'd better
get down to my own bisection.
Hugh
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