Date: Mon, 28 Sep 2009 18:36:17 +0200
From: Pavel Machek <pavel@ucw.cz>
To: Michael Tokarev <mjt@tls.msk.ru>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.31: booting on a PIII Celeron?
Message-ID: <20090928163617.GA25503@atrey.karlin.mff.cuni.cz>
References: <4AC0D59F.8000502@msgid.tls.msk.ru> <4AC0D651.7030009@msgid.tls.msk.ru>
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> Michael Tokarev wrote:
> >Hello.
> >I've a problem here with 2.6.31.  kernel is
> >compiled for PIII:
> >
> > CONFIG_MPENTIUMIII=y
> > CONFIG_X86_GENERIC=y
> >
> >This kernel works on real PIII machine - like this:
> >
> >vendor_id    : GenuineIntel
> >cpu family    : 6
> >model        : 8
> >model name    : Pentium III (Coppermine)
> >stepping    : 10
> >cpu MHz        : 997.580
> >
> >But it fails on a Celeron:
> >
> >vendor_id    : GenuineIntel
> >cpu family    : 6
> >model        : 8
> >model name    : Celeron (Coppermine)
> >stepping    : 6
> >cpu MHz        : 797.481
> >
> 
> There's one more difference between the two:
> 
> PIII, working:
> flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 
> mmx fxsr sse up
> Celeron, !working:
> flags: fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pse36 mmx 
> fxsr sse up
> 
> So the celeron machine lacks "apic" flag.  And in my
> kernel config, apic is enabled:
>  CONFIG_X86_LOCAL_APIC=y
>  CONFIG_X86_IO_APIC=y
> (but not on the command line like apic=force)
try 'noapic nolapic' to see if it helps?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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