Hello I am not able to see the surface by running "tksurfer bert lh pial". I receive the error "surfer: ### redraw failed: no gl window open". I have tried "export doublebufferflag=1". Mesa is installed and updated. Linux ATI drivers is installed. Os: Fedora 11 Graphics: ATI RV515 X1300. I have tried rh9 and CentOS4 versions of the freesurfer on separate Fedora 11 and CentOS 5. On CentOS I see only a small part of the image. I have tried NVIDIA graphic cards too. 3D games work fine. I am very grateful if you may assist me. Sina