[vtkusers] extension "GLX" missing on display (vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual)

Sat Apr 2 09:51:11 EST 2005

hi there,

i'm running:

FreeBSD 4.10-STABLE FreeBSD 4.10-STABLE #0: Wed Jun 23 01:36:48 GMT 2004

i use XFree86. i successfully built the C++ test app for VTK, and when i run it, i get:

Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
ERROR: In /usr/home/iain/dist/vtk/VTKFiles/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, line 219
vtkXOpenGLRenderWindow (0x805fe00): Could not find a decent visual

X Error of failed request:  BadColor (invalid Colormap parameter)
  Major opcode of failed request:  84 (X_AllocColor)
  Resource id in failed request:  0x0
  Serial number of failed request:  18
  Current serial number in output stream:  18

the result of xdpyinfo is:

iain at piper> xdpyinfo
name of display:    :0.0
version number:    11.0
vendor string:    The XFree86 Project, Inc
vendor release number:    40300000
XFree86 version: 4.3.0
maximum request size:  4194300 bytes
motion buffer size:  256
bitmap unit, bit order, padding:    32, LSBFirst, 32
image byte order:    LSBFirst
number of supported pixmap formats:    7
supported pixmap formats:
    depth 1, bits_per_pixel 1, scanline_pad 32
    depth 4, bits_per_pixel 8, scanline_pad 32
    depth 8, bits_per_pixel 8, scanline_pad 32
    depth 15, bits_per_pixel 16, scanline_pad 32
    depth 16, bits_per_pixel 16, scanline_pad 32
    depth 24, bits_per_pixel 32, scanline_pad 32
    depth 32, bits_per_pixel 32, scanline_pad 32
keycode range:    minimum 8, maximum 255
focus:  window 0x1a00005, revert to PointerRoot
number of extensions:    25
    BIG-REQUESTS
    DOUBLE-BUFFER
    DPMS
    Extended-Visual-Information
    FontCache
    LBX
    MIT-SCREEN-SAVER
    MIT-SHM
    MIT-SUNDRY-NONSTANDARD
    RANDR
    RENDER
    SECURITY
    SHAPE
    SYNC
    TOG-CUP
    X-Resource
    XC-APPGROUP
    XC-MISC
    XFree86-Bigfont
    XFree86-Misc
    XFree86-VidModeExtension
    XInputExtension
    XKEYBOARD
    XTEST
    XVideo
default screen number:    0
number of screens:    1

screen #0:
  dimensions:    800x600 pixels (271x203 millimeters)
  resolution:    75x75 dots per inch
  depths (7):    24, 1, 4, 8, 15, 16, 32
  root window id:    0x37
  depth of root window:    24 planes
  number of colormaps:    minimum 1, maximum 1
  default colormap:    0x20
  default number of colormap cells:    256
  preallocated pixels:    black 0, white 16777215
  options:    backing-store NO, save-unders NO
  largest cursor:    64x64
  current input event mask:    0xda4031
    KeyPressMask             EnterWindowMask          LeaveWindowMask
    KeymapStateMask          StructureNotifyMask      SubstructureNotifyMask
    SubstructureRedirectMask PropertyChangeMask       ColormapChangeMask
  number of visuals:    1
  default visual id:  0x21
  visual:
    visual id:    0x21
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits

the result of glxinfo is:

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

after reading these posts:

http://public.kitware.com/pipermail/vtkusers/2002-January/058980.html
http://public.kitware.com/pipermail/vtkusers/2000-January/052691.html

i have uncommented the line in my XF86Config file:

Load "glx"

and restarted x. my video card is quite crappy, so i'm not sure if it can, like, load glx or not. here is the relevant section from XF86Config:

Section "Device"
    Identifier  "Standard VGA"
    VendorName  "Unknown"
    BoardName   "Unknown"

# The chipset line is optional in most cases.  It can be used to override
# the driver's chipset detection, and should not normally be specified.

#    Chipset    "generic"

# The Driver line must be present.  When using run-time loadable driver
# modules, this line instructs the server to load the specified driver
# module.  Even when not using loadable driver modules, this line
# indicates which driver should interpret the information in this section.

    Driver     "vga"
# The BusID line is used to specify which of possibly multiple devices
# this section is intended for.  When this line isn't present, a device
# section can only match up with the primary video device.  For PCI
# devices a line like the following could be used.  This line should not
# normally be included unless there is more than one video device
# intalled.

#    BusID      "PCI:0:10:0"

#    VideoRam   256

#    Clocks     25.2 28.3

EndSection

# Device configured by xf86config:

Section "Device"
    Identifier  "My Video Card"
    Driver      "vga"
        # unsupported card
    #VideoRam    1024
    # Insert Clocks lines here if appropriate
EndSection

i'm using a card that i just found lying around. i have no idea what it is, but will generic vga drivers support glx? i don't even know what GLX is really!

let me know if there is any more info that it would be useful to supply

cheers

iain