I notice some people are having problems with Xorg in the new version. I helped someone earlier fix it in IRC at an unoffocial slitaz channel at freenode. (channel is #slitaz) if you feel like joining. On to a fix for at least intel if what I describe below is the actual problem.
Download the Intel driver you need. If you read the wiki you would know what to look for.
Now download this:
tazpkg get-install linux-agp
Then as root edit rcS.conf
nano /etc/rcS.conf
Add "agpgart" and "intel-agp" to look something like below. Don't pay attention to the other stuff. Everyone's computer is different Just have the two I showed you in that order.