This is not my first post about kernel crashing (see old posts as: 
spontaneous reboots).

However now I have some more information to provide you. So I hope it 
could help to determinate the problem that many people have.

First: the hardware

cpu 
        : 740/750
temperature     : 39 C (uncalibrated)
clock 
        : 300MHz
revision 
: 2.2 (pvr 0008 0202)
bogomips 
: 598.01
machine 
        : PowerMac1,1
motherboard 
: PowerMac1,1 MacRISC Power Macintosh
L2 cache        : 512K unified
memory 
        : 96MB
pmac-generation 
: NewWorld

Second: the kernel

Linux serverg3 2.4.18-6.1mdk #1 lun giu 24 07:53:06 CEST 2002 ppc

Third: the facts

I upgraded from 8.0 to 8.2 PPC hoping that the crash/reboot problem will 
solve: well, it still persists.

One or 2 times I could see the error on the monitor (it was months I was 
  trying to see it, because when the crash happens the machine reboots 
by itself and no messages in the logs).

The error said something like:
"Machine check in kernel mode
Caused by (from SRR1=41000): Transfer error
"
... could not read ...

"Altivec error"

.... could not read...


So it seems to be something about altivec.


Yesterday I recompiled the kernel *without* altivec support (my G3 does 
not have altivec).

Today the new crash with the same error.

My next step is to leave mdk kernel and recompile the unpatched one from 
kernel.org


Has someone an idea about this ?

Note that the crash is rare: it can crash in 24 hours or in 25 days.






Hoping my informations can be helpful,


Miguel Beccari



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