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Old 03-29-2012, 11:24 AM
Jelle de Jong
 
Default Bug#666017: linux-image-3.2.0-0.bpo.2-686-pae crashes during or after initial ramdisk on alix6e2 hardware

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# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 10
model name : Geode(TM) Integrated Processor by AMD PCS
stepping : 2
cpu MHz : 498.102
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu de pse tsc msr cx8 sep pge cmov clflush mmx mmxext
3dnowext 3dnow up
bogomips : 996.20
clflush size : 32
cache_alignment : 32
address sizes : 32 bits physical, 32 bits virtual
power management:

# 2.6 works
http://packages.debian.org/squeeze/linux-image-686
dep: linux-image-2.6.32-5-686
http://packages.debian.org/squeeze/linux-image-2.6.32-5-686

# 3.2 will not boot..
http://packages.debian.org/squeeze-backports/linux-image-686
dep: linux-image-686-pae
http://packages.debian.org/squeeze-backports/linux-image-686-pae
dep: linux-image-3.2.0-0.bpo.2-686-pae
http://packages.debian.org/squeeze-backports/linux-image-3.2.0-0.bpo.2-686-pae
# says to support AMD Geode NX

Both are 32 bit kernels. What am I missing? Can somebody take a good
look at this. I don't have much time to debug, but making the default
debian 3.x .. 686 32bit kernel to work is very important for me.

Kind regards,

Jelle de Jong
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Old 03-29-2012, 11:30 AM
Jelle de Jong
 
Default Bug#666017: linux-image-3.2.0-0.bpo.2-686-pae crashes during or after initial ramdisk on alix6e2 hardware

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On 29/03/12 13:24, Jelle de Jong wrote:
> fpu de pse tsc msr cx8 sep pge cmov clflush mmx mmxext 3dnowext
> 3dnow up

Seems there is no pae instruction there!!! (overlooked that)

When will there be a non pea 3.x kernel like with the 2.6 kernel
available in Debian?

Kind regards,

Jelle de Jong
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Old 03-29-2012, 12:12 PM
Simon McVittie
 
Default Bug#666017: linux-image-3.2.0-0.bpo.2-686-pae crashes during or after initial ramdisk on alix6e2 hardware

On Thu, 29 Mar 2012 at 13:30:54 +0200, Jelle de Jong wrote:
> When will there be a non pea 3.x kernel like with the 2.6 kernel
> available in Debian?

>From the kernel changelog:

* [i386] Rename '686-bigmem' flavour to '686-pae'; remove '686' flavour.
For 686-class systems without PAE, the '486' flavour is more efficient
than the '686' flavour due to optimisation for uniprocessor systems.

So you should use the -486 flavour on non-PAE hardware. Larger numbers
aren't necessarily better :-)

Perhaps the linux-image-686 transitional package should depend on
linux-image-486 (the conservative/safe/lowest-common-denominator choice).
On the other hand, linux-image-686-pae (the former "bigmem" version) is
more appropriate for most mainstream CPUs (although not for unusual CPUs like
your Geode), which is presumably the reason why automatic migration
from -686 is to that one.

The kernel team's advice on the appropriate new kernel for various CPUs
should probably go in the wheezy release notes, particularly if cases
like this exist.

S




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