Is there a simple, safe way to trigger a GPU lockup on a susceptible computer?

Posted by Abe on Ask Ubuntu See other posts from Ask Ubuntu or by Abe
Published on 2012-06-28T01:08:34Z Indexed on 2012/06/28 3:25 UTC
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Filed under:

12.04

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ati

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gpu

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debugging

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xinerama

Answers to my previous question, Ubuntu 12.04 froze, requiring powercycle. What should I look / grep for in the logs?, have led me to suspect that my computer is experiencing an intermittent GPU lockup. It has been happening about once a week, usually when I am using Chrome. Today it happened when I was creating a diagram on lucidchart

I have a Dell Optiplex 755 with an ATI Radeon HD 2400 XT and dual monitors running in Xinerama mode. I am using 12.04 with the proprietary ATI driver installed.

When the computer locks-up, I can still ssh in. And I would like to follow the instructions on reporting this provided at https://wiki.ubuntu.com/X/Troubleshooting/Freeze

Is there a (safe) way to cause a GPU lockup so that I can go ahead and file a bug, rather than waiting until it happens again?

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