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Old 09-25-2011, 06:40 PM
trouble daemon
 
Default Bug#586494: Possible PNP issue on Dell PowerEdge 4200 unless noapic used

Heya,

On Sun, Sep 25, 2011 at 8:24 AM, Bjorn Helgaas <bhelgaas@google.com> wrote:
> [Resending since gmail made it HTML, which LKML thinks is spam. *sigh]
>
> On Sat, Sep 24, 2011 at 6:28 PM, Jonathan Nieder <jrnieder@gmail.com> wrote:
>>
>> (just cc-ing linux-kernel so any work on this gets archived)
>> trouble daemon wrote:
>>
>> > Greetings,
>> >
>> > Hello Adam and Bjorn. I am sending this email to you as suggested by
>> > Jonathan regarding a problem that I was having with Linux on a pair of
>> > old Dell PowerEdge 4200 machines that I own (yes, they still run!).
>> >
>> > I have left the most recent reply between Jonathan and I quoted below,
>> > but you can find the original bug report at the Debian bug tracker
>> > under bug #586494 [1]. As a brief recap, I have been required to use
>> > the noapic kernel option in these systems in order to allow them to
>> > boot, and appears to have originated after a commit to the kernel
>> > relating to EISA (although it has come to my attention now that PNP
>> > may be related as well).
>> >
>> > As suggested, I have attached a copy of the "quick & dirty" config I
>> > used for a vanilla 3.1.0-rc7 kernel I compiled, along with the boot
>> > log of the machine, and a diff against the apic log of a working boot
>> > of the same kernel when using noapic. One thing that I should mention
>> > is that on these dells, I also usually use the pnpbios=off option to
>> > hide the pesky warnings on boot, in addition to noapic.
>> >
>> > I hope these logs help you in some way. If there is anything else you
>> > might be interested in knowing or testing, don't hesitate to ask!
>>
>> Original report: http://thread.gmane.org/gmane.linux.kernel/1000807
>> Logs: http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=86;bug=586494
>>
>> > Dan McGrath
>> >
>> > PS - Not a problem Jonathan, thanks!
>> >
>> > [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=586494


> Dan, can you try the attached patch? *I'm not an MPS expert, but from
> inspecting f8924e770, it seems suspect that we used to always set the
> mp_bus_not_pci bit, then clear it if we found a PCI bus. *After
> f8924e770, we set mp_bus_not_pci for ISA buses, clear it for PCI
> buses, and leave it alone otherwise.

Success! Booted up like a charm in 3.1.0-rc7 with the patch applied
and no kernel boot params.

Thank you for figuring it out *bow*
 

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