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I have installed Kubuntu 12.10 on a new computer. Every few hours of work, the system locks up. The keyboard and mouse are unresponsive, and the screen does not change even if there exist on the screen elements that should change (such as a countdown timer or the system clock). I cannot use Ctrl-Alt-F* to get to a terminal. The hard drive light flickers briefly once every 10-15 seconds, this is a much slower pace then is observed when the system is functioning properly.

The applications running at the time of lockup include: Skype, RSIbreak, Zim, Anki, Firefox, Konsole with an active SSH session, apache2, mysqld, and of course KDE. The issue has occurred with 2 different keyboards, but I have not tried a different mouse yet. As these are the tools needed for work, I cannot simply run for a few hours with them disabled to see if any are the 'guilty party'. The lockup occurs both while I am actively typing on something, or if I have stepped away for a few minutes.

The following hardware is installed:

  • Gigabyte F2A55M-HD2
  • GeForce 210
  • AMD processor, 4 GiB memory, 1 TB hard drive, 500W power supply

More detailed hwinfo can be found here.

I plan on running memtest overnight. What else should I check, and how might I get a log of the problem? Thank you.

EDIT: The system just locked up again with only Firefox, Chrome, Konsole and KDE running. Here is the syslog. Thanks.

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I would start with the video card driver (delete the 3rd party version and test the default one or install it if you do not use it yet). Mouse and keyboard should not be the problem (those are far too generic). Memtest is indeed a good thing to do. In /var/log/ there should be log files (/var/log/syslogd) Might be worth it to check these for notifications. – Rinzwind Jan 8 '13 at 11:19
up vote 1 down vote accepted

The problem was with a defective video card. Removing the card and using the onboard VGA output resolved the issue.

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