Comment 8 for bug 647461

I had recently dist-upgrade from lucid to maverick and I had same error in my /var/log/Xorg.0.log (dlopen: /usr/lib/xorg/extra-modules/modules/glesx.so: undefined symbol: PictureScreenPrivateKeyRec) -> Empty black screen after the splash screen at normal startup. Before dist-upgrade, i used fglrx (catalyst 10.9) without problem.
After researchs, I discover some dependancy errors with packages like xserver-xorg or xserver-xorg-core. Versions was build for lucid (why? I don't know).

So I tried :
sudo dselect dist-upgrade --> propose to remove my old lucid package (lucky me)
sudo aptitude install fglrx --> install fglrx and (a lot of) dependancy. Maybe sudo apt-get install fglrx is enough, I don't know, I don't try this first.

At this point, I could boot in recovery mode, lauch failsafeX, use an empty xorg.conf, restart X, log in, and hug my so missed desktop. I already knew this situation after upgrading fglrx with packages from amd/ati. The "undefined symbol" problem was solved.

Finally, I followed instructions to remove fglrx (ubuntu restricted) : http://wiki.cchtml.comindex.phpUbuntu_Lucid_Installation_Guide#Removing_the_Driver
and followed instructions to build and install fglrx (amd/ati) :
http://wiki.cchtml.com/index.php/Ubuntu_Lucid_Installation_Guide#Download_the_latest_Catalyst_package.
3D acceleration back. Smiles on my face too.

Thx for reading.