I have the same problem, using a geforce 256 (nv10) AGP card. I have the nvidia-glx-legacy driver installed and the "glx" module configured to load in my xorg.conf. I'm about to re-run nvidia-xconfig in the hope that it will fix this but I don't know what nvidia-xconfig is supposed to do (apart from amending xorg.conf to enable the glx module) and it is non-interactive so I can't tell if it is working.
Below is the output from glxinfo: name of display: :0.0 Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". Error: couldn't find RGB GLX visual visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat ---------------------------------------------------------------------- Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x21 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x22 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x23 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x24 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x25 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x26 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x27 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x28 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x29 24 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x2a 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x2b 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x2c 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x2d 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x2e 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x2f 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x30 24 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Xlib: extension "GLX" missing on display ":0.0". Xlib: extension "GLX" missing on display ":0.0". 0x80 32 tc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None Segmentation fault (core dumped) -- glx info crashes after nvidia-glx-legacy install https://launchpad.net/bugs/84574 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs