This is just a guess but I think this might be related to nvidia drivers. I had similar issues with Xubuntu 13.04 and I finally managed to resolve them by booting in recovery and installing nvidia-current. The last error message seems to support this as drm seems to stand for Direct Rendering Manager.
This is just a guess but I think this might be related to nvidia drivers. I had similar issues with Xubuntu 13.04 and I finally managed to resolve them by booting in recovery and installing nvidia-current. The last error message seems to support this as drm seems to stand for Direct Rendering Manager.