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Re: current kernel + userland just resets

Riccardo Mottola wrote:

On Sep 26, 2011, at 8:34 AM, Riccardo Mottola wrote:
Now it just happened again. There was no reboot, the machine just hung... 
stopped responding. Locally, the machine has a black screen and doesn't respond 
to even simple stuff like caps-lock. So I need to keep the power button pressed 
and recycle it.
This is sounding more like a failing PSU or maybe leaky caps on the 
motherboard, causing PWR_OK to be de-asserted and the machine to hard-hang, 
requiring a full power-cycle.

true, but it is a laptop with a new battery... It worked very reliably until... the last kernel update. Of course, coincidences happen... however....

I've come across several laptops (from different manufacturers) that randomly switch off, the problem has always been traced to a faulty lid switch (the contactless magnetic/hall effect type, not the old style microswitch ones). Change the OS and the problem goes away or the symptom changes. Similarly disable the power management and the problem stopped. Could it be power management shutting down the computer? getting the switch fixed usually requires a keyboard replacement under the warranty.

all the best,


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