Kernel Panic / Crash, Kdump no help

[Les]

On Thu, 2007-07-26 at 13:35 -0400, Kevin H. Hobbs wrote:
> On Thu, 2007-07-26 at 17:33 +0100, Alan Cox wrote:
> > What do you get on the console when not in X ?
> 
> Unfortunately I haven't seen anything on the text console yet.
> 
> > > Any clue why kexec and kdump don't work? 
> > 
> > Nope sorry
> > 
> 
> Drat, thanks anyway.
> 
> > There is a tool called memtest86 which can do serious grade memory
> > testing and will also sometimes find cache problems as well if they are
> > there. Worth running on the box for a day or so 
> 
> I've just run memtest86 a few times. I ran it with all four memory
> modules in and got errors almost immediately. I ran it on each module
> individually for one pass and I got no errors. I guess I'll try it in
> pairs. Is there any reason why using both memory channels would cause
> trouble?
If you put in more memory than the Motherboard has access to, then the
unused bits would present either duplicate data with somewhat different
timing, or if the extra address bits are floating, then random data
would appear, as one or more boards are misaddressed.  This could cause
such a problem.

Regards,
Les H