Please take a look at 8385 bug report here, as it might be relevant:
On 4/30/07, Michal Piotrowski <michal.k.k.piotrowski@xxxxxxxxx> wrote:
> On 30/04/07, Sebastian Kemper <sebastian_ml@xxxxxxx> wrote:
> > Hello all,
> > I have updated some different boxes to 2.6.21 with success. One laptop,
> > though, has some issue with it.
> > It's an Acer TravelMate 4002WLMi. Sometimes it boots fine and sometimes
> > not. Thanks to netconsole you can see what happens when it boots fine in
> > the attached bootsie.out.good. bootsie.out shows what happens on the
> > screen when things get out of hand (kernel panic).
> > Also attached you'll find the output of lspci, lsusb, ver_linux and the
> > kernel configuration.
> > If there's more you need (git bisection or more info in general,
> > testing ...) just say so.
> > Thanks in advance!
> > Regards
> > Sebastian
> > P.S.: Please CC.
> I added this to the list of known regressions.
> Len and ACPI folks CC'ed.
> Michal K. K. Piotrowski
> Kernel Monkeys
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