Versions used:

kernel:
 - 2.6.32 and drm-intel git (4f8d619cc3ab805aa1726c1dfe196a0705b955bd)

xorg:
 - xorg server 1.7.3
 - xf86-video-intel from git
 - libdrm from git

Created attachment 31929 [details]
lspci

Created attachment 31930 [details]
dmesg extract

Created attachment 31931 [details]
Xorg log

Created attachment 31932 [details]
xorg.conf

Your X log indicates DRI is initialized correctly.  What do you mean it fails?

Well that is true DRI claims to be running with glxinfo but if I try to start glxgears all I get is a black box where the window should be and corruption around the rest of the screen. Also looking at the dmesg output, something isn't right, unless those error messages are expected?

Which mesa do you use? If you used a snapshot about 1 week ago, that might be bug#25433, which has been fixed.

(In reply to comment #8)
> Which mesa do you use? If you used a snapshot about 1 week ago, that might be
> bug#25433, which has been fixed.
> 

media-libs/mesa-7.5.2

(In reply to comment #9)
> media-libs/mesa-7.5.2

It's a bit old. Can you try 7.7-rc2 or the upcoming 7.7 release? 7.6.x should also be a much better choice than 7.5.x.

(In reply to comment #10)
> (In reply to comment #9)
> > media-libs/mesa-7.5.2
> 
> It's a bit old. Can you try 7.7-rc2 or the upcoming 7.7 release? 7.6.x should
> also be a much better choice than 7.5.x.

Ok, I'm rebuilding my entire X from git

I guess this problem went away.