[clug] What is it telling me?

Ben Nizette bn at niasdigital.com
Wed Jan 5 00:41:38 MST 2011

On 05/01/2011, at 6:12 PM, Algis Kabaila wrote:

> In particular, is the segfault in the RAM?

Hehe erm, what do you mean by that?  All programs necessarily run from RAM (on a regular PC) and a segfault is, by definition, such a program trying to access a bit of RAM it isn't allowed to.  In particular, this time it's tried to access address '4' which indicates that rather than a true null-pointer dereference it's probably a dereference of an element of a null struct.

The segfault thrown from within libGL while it was being used from kwin_opengl_tes so the problem is in the desktop compositing.  Have a good look over the Ubuntu forums and bugzilla and see whether you can see anyone else having the same kind of problem, otherwise it's probably a fault with the graphics card initialisation.  If you can't find a software issue (like upgrading kernel, graphics driver version etc) then just try re-seating the graphics card.  If that's not a go then disable opengl compositing and see whether the problem goes away.

Hope this helps :-)

>  There is a gap of 
> time between 
> 5 11.20.10
> and
> 5 11.29.08
> which suggests that this is the problem time. 
> Al.
> -- 
> Algis
> http://akabaila.pcug.org.au
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