Ubuntu keeps crashing (again after fresh install)

[HandleWithCare]

Hi all,

My ubuntu box keeps crashing for (to me) unknown reasons. This happend with 12.04 and the problem remains after a fresh 12.10 install. It is very unclear what happens. As soon as the machine start random applications fail and I'm shown a window stating Ubuntu had an error and the application must be closed. It is a different application every time. Then at some moment, sometimes within a minute, sometimes after two days the machine just stops. Sometimes I just get a black screen, other times I get screens as in the photos I attached (different every time) and at other times there is no output to my screen at all anymore.

I have no idea what information would be needed to tackle this problem but the output of lshw can be found here: LIST OF HARDWARE .

Normally I would take a look in the logs but another unfortunate part of this problem is that >14GB of system log is created, which is, a lot.

I have done a memcheck and diskcheck. No errors were found.

Any hint on how to fix this problem is very welcome.

[mörgæs]

Please give a complete hardware description.

Have you tried the memory test in a live boot?

[HandleWithCare]

There is a link in the topic start to the complete hardware list, I made the link more prominent. I also updated the post with the fact that I did disk en memory checks and that no error were found during.

[mörgæs]

It seems you have both Nvidia and Radeon graphics cards. Have you tried removing one of them?

[HandleWithCare]

Actually there is only one graphics card (ati). There are no onboard graphics either.

[QIII]

Does this happen in a Live CD session with Ubuntu?

Try a live session with another distro. Does it happen then?

Are you sure your install media is clean?

As large as they are, your logs are probably a very valuable resource for troubleshooting this.

[HandleWithCare]

I have not seen this problem in a live session. However, as I mentioned this problem does not occur after a fixes time period. Sometimes it runs for two days without crashes

[Cope57]

My guess would be a hardware failure. Could be the commonly overlooked power supply or simply some connections have come loose.

[HandleWithCare]

Yes that was my guess as well. All connections seem fine. I have replaced the power supply to no avail.

[Cope57]

Any response with the bug report? https://bugs.launchpad.net/

What errors do you have in your logs?