Re: Need docs on DGA to track down possible bug

On Thu, 19 Dec 2002 [email protected] wrote:

> I am trying to track this problem down, but I'm not sure yet what is to
> blame. I have made a small program which also exhibits some similar
> problems, but I do not know enough about the functions/libraries to see
> what is not working the way it should.

I now know the problem is the combination of DGA and Xinerama. No matter
where I look on the net, DGA is always disabled in configs that turn on
Xinerama.

Both programs I mentioned only use the XF86DGADirectMouse flag in the call
to XF86DGADirectVideo and I don't think mouse movement has to be a problem
with DGA + Xinerama.

Now I would like to start debugging, but I have no experience whatsoever
with making modifications to X. Is it possible to keep X running and only
modify the DGA extension and then reload it or something?
And how would I go about debugging it; will I have to compile a separate
debugging version of X to be able to step through the source with a
debugger?

I suppose there are people around who have already figured out the most
convenient ways to debug things like this.

Any pointers would be greatly appreciated.

Thanx,
Maurice van der Pot