Weird system freeze. Nothing works keyboard/mouse/reset button - Ubuntu 12.04 64bits [closed]

Posted by Simon on Ask Ubuntu See other posts from Ask Ubuntu or by Simon
Published on 2012-07-15T15:16:26Z Indexed on 2012/11/01 23:21 UTC
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12.04

|

freeze

I have fresh PC:

i5 3570K with Intel 4000 onboard
ASrock Z77 Extreme4-m
8GG RAM - Adata 1333Mhz...
1TB Seagate drive 7200rpm

I've also fresh systems - Ubuntu/Win7 and today there was something strange. Ubuntu twice just freezed. Everything stopped, even keyboard and mouse wasn't responding. Even RESET button didn't work.

Right now memtest is running, but I'd like to know, where else can i look for cause. Can it be software fault if even reset isn't working? Only long reset pressing rebooted PC... I'm a bit confused. Or should I test components - CPU, motherboard, disk.

Which logs in Ubuntu should I check to diagnose cause?

EHm I had few adventures with this PC already. Shipped motherboard was broken (ASrock Z68 Extreme3) and had old bios, so I had to contact with reseller, replace it and at the end decided on Z77, but everything took 3 weeks, so I have bad feelings...

Edit: Both freezes were during editing something in gedit (it can be coincidence) and after few updates today - when memtest is end I'll check what was updated

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