Xorg server using 100% CPU. Can reproduce. Need help to track the issue

[phil lemelin]

Good evening list,

I'm having a reproducible issue with the X when using "vmg" (
http://magnifier.sourceforge.net/ ). It will systematically make the Xorg
process use 100% cpu and basically locks the machine. I just start it, move
it around and I hit the issue.

I tried the following in order to track the issue :

Tried it with my first version of X on mandriva 2009.1 : X.Org X Server
1.6.1
I then tried with a newer version of X : X.Org X Server 1.6.4
Finally, I compiled another version of X : X.Org X Server 1.7.6

A little bit more information on the modules I run.

(II) Module extmod: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 1.0.0
--
(II) Module dbe: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 1.0.0
--
(II) Module glx: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 1.0.0
--
(II) Module dri: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 1.0.0
--
(II) Module dri2: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 1.1.0
--
(II) Module intel: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 2.9.1
--
(II) Module vgahw: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 0.1.0
--
(II) Module fb: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 1.0.0
--
(II) Module evdev: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 2.4.0


I'm looking for some more information on how I could track the issue and
find why the X process takes 100% of cpu and locks the machine like that.
I looked into the debugging section of the X using gdb but it seems to cover
crashes more than my current case.

Let me know what additional information would be needed to help anwser the
question.

Thank you.

Phil.
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