Best way to debug an Intel Core i5 hang - likely graphics (possibly power) related

Hi :)

On Tue, Jan 31, 2012 at 10:00, Graeme Russ [off-list ref] wrote:

I _think_ I've solved the problem - SDRAM Voltage

You got my respect man, you're really stubborn :)

The SDRAM I am using has a rated operating voltage of 1.5V +/- 0.075.
It looked like the motherboard BIOS had decided to use the upper limit
of 1.575V when set to 'Auto'. I changed it to 'Manual' and set the
SDRAM voltage to 1.5V and it's been running stably for the longest
time it ever has.

Thanks (again) for sharing. So this indeed has tight relationship with
RAM "misbehaviour". How do you know it? Do you inspect every piece of
your hardware? I am curious to know (maybe others too).

NB: it could be a good lesson that system lock up might have
absolutely nothing to do with kernel.

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com