[linux-audio-user] problem with snd

Using the current Planet CCRMA rpms on a RedHat 8.0 system running ALSA, lowlat kernel, etc. I get the following error when trying to execute the graphical snd linked to openmotif: Xlib: extension "NV-GLX" missing on display ":0.0". Segmentation fault Snd and its tools work fine at the console, but this gui problem has me stumped. My Dell 410 Workstation has the NVIDIA/TNT2 video chipset but I am running the distro's XFree86 driver not the chipmaker's accelerated one. I'm assuming this NV-GLX in the error message is in reference to a video configuration problem. I guess I'm not making this sound like a Linux-audio problem, but afterall, it is snd. Any help would be greatly appreciated. Frank