Fwd: kernel: MCA: CPU 0 COR (1) internal parity error

[Matthias Apitz]

El día Sunday, April 19, 2015 a las 10:52:17PM +0200, Marius Strobl escribió:

> On Sun, Jan 18, 2015 at 07:08:43AM +0100, Matthias Apitz wrote:
> > 
> > Hello,
> > 
> > I'm running since some days a recent -HEAD r276659 on an Acer C720 Chromebook
> > which works very nicely and fast (I really have never seen such a fast KDE4 desktop).
> > 
> > >From time to time (let's say 2-3 times a day) I see messages like this
> > in /var/log/messages:
> > 
> > Jan 16 12:04:24 c720-r276659 kernel: MCA: Bank 0, Status 0x90000040000f0005
> > Jan 16 12:04:24 c720-r276659 kernel: MCA: Global Cap 0x0000000000000c07, Status 0x0000000000000000
> > Jan 16 12:04:24 c720-r276659 kernel: MCA: Vendor "GenuineIntel", ID 0x40651, APIC ID 0
> > Jan 16 12:04:24 c720-r276659 kernel: MCA: CPU 0 COR (1) internal parity error
> > 
> 
> <...>
> 
> > CPU: Intel(R) Celeron(R) 2955U @ 1.40GHz (1396.80-MHz 686-class CPU)
> >   Origin="GenuineIntel"  Id=0x40651  Family=0x6  Model=0x45  Stepping=1
> 
> Apparently, this is the HSD131 or - more precisely - the HSM142 silicon
> bug, although the specification update concerened with HSM142 [1] only
> enlists CPU IDs 0x3c and 0x46 (actually, it only has identification
> information for the M- and H-line of processors, but not the Y- and -
> which Celeron 2955U belongs into - U-lines). Reporting should be gone
> with r281751.
> 
> Marius
> 
> 1: http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/4th-gen-core-family-mobile-specification-update.pdf
> 

Hello Marius,

Thanks for a pointer to this explanation and bug fix. I pulled out mca.c
of r281751 and the diff looks like I could simply update mca.c to this
revision.

Thanks

	matthias

-- 
Matthias Apitz, guru at unixarea.de, http://www.unixarea.de/ +49-170-4527211    +49-176-38902045
"Wenn der Mensch von den Umständen gebildet wird, so muß man die Umstände menschlich bilden."
"Si el hombre es formado por las circunstancias entonces es necesario formar humanamente
las circunstancias", Karl Marx in Die heilige Familie / La sagrada familia (MEW 2, 138)
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