Johann Spies napsal(a) dne 21.7.2016 v 10:10:
Check your logs (dmesg, syslog and messages) for possible indications 
on why this happens.
well I can see nothing....
debug: http://pastebin.com/ZGrWvCky
messages: http://pastebin.com/WX7HKdnm
syslog: http://pastebin.com/vhpyQKdD
If you suspect high temperature as the main culprit, there are 
applets to monitor temperatures of different parts of the system.  
Install it.
I have one, but it doesnt not log anything. As I say, now it happens 
even if the temperature is 45degreess.
Also, have you tried to do a Ctrl-F3 (to go to the console) when 
Gnome becomes unresponsive?  Or if you have another computer on the 
same network segment, try to ssh to your computer and see what is 
going on (dmesg, the logs etc.)
Nothing works, even ssh, even CTRL-F3.
Thank you
Pavel