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SubjectRe: 2.6.25-current-git hangs on boot unless CONFIG_CPU_IDLE=n - Apple
On Thu  3.Apr'08 at 20:15:02 -0700, Ray Lee wrote:
> On Thu, Apr 3, 2008 at 6:10 PM, Carlos R. Mafra <crmafra2@gmail.com> wrote:
> > On Thu 3.Apr'08 at 17:14:22 -0700, Pallipadi, Venkatesh wrote:
> > > >The following report is on the current list of known regressions
> > > >from 2.6.24. Please verify if the issue is still present in the
> > > >mainline.
> > > >
> > > >
> > > >Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10093
> > > >Subject : 2.6.25-current-git hangs on boot
> > > >unless CONFIG_CPU_IDLE=n - Apple
> > > >Submitter : Soeren Sonnenburg <kernel@nn7.de>
> > > >Date : 2008-02-23 18:55 (41 days old)
> > > >References : http://lkml.org/lkml/2008/2/23/263
> > > >
> > > >http://marc.info/?l=linux-acpi&amp;m=120387537018467&amp;w=4
> > > >Handled-By : Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com>
> > > >
> > >
> > > Last comment I saw from Soeren says it does not really hang. It waits
> > > for 5-10 seconds sometimes before continuing. We are still trying to
> > > narrow this down with max_cstate etc..
> >
> > I should say that my laptop (Vaio) _hangs_ at boot (less than 10% of boots)
> > and this is the last message I see:
> >
> > "ACPI: Processor [CPU1] (supports 8 throttling states)"
> >
> > and it stays there "forever" (more than 1 or 2 minutes at least).
> >
> > I am not using my laptop too much these days, and I thought this
> > bug had been solved because it didn't hang for the last week (but
> > I boot it once per day), however it hang last night (using some
> > post 2.6.25-rc7 kernel)
> >
> > I have pictures of the screen while showing this last message at boot,
> > should I post it somewhere or that is not necessary?.
>
> If the sysrq key still works when that happens, try to do a sysrq-t,
> s, b to generate a trace, sync the filesystem, and reboot. If anything
> made it to the logs, please post it.

Sysrq keys don't work when it hangs, I have to push the power button.

Another thing to notice is that when it happens, it usually happens
more times in a row (like 3 times). And then it can take many boots to
happen again.

I've uploaded the picture where it hangs, it is in the very beginning
of the boot process:

http://www.ift.unesp.br/users/crmafra/dsc04673.jpg


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