Jruschme is right on the money. Xorg issues are out of our (MintPPC's) hands. Debian has been doing a lot of messing around upstream with this as of late. In the past several weeks we've had several machines come online and go offline in this regard.
@Mr. Ksoft
Try MintPPC 9.3. A Pismo is JD's primary G3 test bed, so I'd be quite surprised if 9 didn't work. (Also keep in mind 9 is stable and 11 is in testing, so 11 is likely to have issues.) 9 is roughly equivalent to Squeeze and 11 to Wheezy. 9 also has xorg file auto-detect.
@Mr. Ksoft
Try MintPPC 9.3. A Pismo is JD's primary G3 test bed, so I'd be quite surprised if 9 didn't work. (Also keep in mind 9 is stable and 11 is in testing, so 11 is likely to have issues.) 9 is roughly equivalent to Squeeze and 11 to Wheezy. 9 also has xorg file auto-detect.
Well, the main DE is JD's custom port of Mint-LXDE and Linux Mint's color scheme is green. You can easily login to plain LXDE if that suits you better. Also, eventually (when I get the time and build machine set back up) I want to finish porting MATE to PPC so we can finally have a workable GNOME alternative.