what may cause unexpected log outs?

Posted by lalebarde on Super User See other posts from Super User or by lalebarde
Published on 2014-06-10T10:15:23Z Indexed on 2014/06/10 15:29 UTC
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linux

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login

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failure

Sometimes, my Linux PC unexpectedly closes my session (log out) while I am working, and puts me back the login window. If I have terminal 1 logged with root and 2 logged with another user (without X), these ones are not logged out. For example, for the last three hours, it has happened five times.

Other times, it leads to a reboot. So I have investigated:

the UPS, but the behaviour is unchanged without it).
the temperatures, but everything is fine (cpu, disks, video card).

I have started to investigate also:

the memory (partially tested - I have to run a full testyt next night). EDIT: totally tested and passed.

My configuration is: Linux 2.6.37-tuxonice x86_64 Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz.

Any idea please?

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