Control: tag -1 moreinfo

On Mon, 2012-11-19 at 21:49 -0500, Neal Murphy wrote:
[...]
> Regardless of what I do as a mortal user, I shoudn't get a black screen of
> death.

Absolutely.

> Attached is a jpg of the screen; I have the 15MP original if I removed too 
> much
> detail.
[...]

This is a *great* picture, absolutely clear.  So the code tells me that
the processor was instructed to read from the address in RCX, and the
dump shows me that the value is:

RCX: f7ffc9000052c1d8

Current 64-bit x86 processors really only use 48-bit virtual addresses,
which must begin with 0000 or ffff.  So this address seems to have been
corrupted: a single bit has changed.

This could be caused by a software bug but it looks much more like a
hardware fault.  You may be able to confirm a RAM fault with
memtest86+.  Unfortunately it doesn't reliably find faults, and it
doesn't particularly stress the CPU or other parts of the system that
could also be at fault.

Ben.

-- 
Ben Hutchings
compatible: Gracefully accepts erroneous data from any source

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