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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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  • you are not accidentally hitting a short-key, like alt+Q or so?
    – Echsecutor
    Jun 10, 2014 at 12:45
  • No, definitively not.
    – lalebarde
    Jun 10, 2014 at 14:50

1 Answer 1

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I have restored the last back-up of my system, and it works correctly again. I think the system was corrupted by a UPS failure along with an electrical brownout.

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